Merge branch 'release/v1.2.0'

41 files changed, 1334 insertions, 359 deletions

diff --git a/server/lib/activitypub/actor.ts b/server/lib/activitypub/actor.ts
index 504263c99..8215840da 100644
--- a/server/lib/activitypub/actor.ts
+++ b/server/lib/activitypub/actor.ts
@@ -1,11 +1,10 @@
 import * as Bluebird from 'bluebird'
-import { join } from 'path'
 import { Transaction } from 'sequelize'
 import * as url from 'url'
 import * as uuidv4 from 'uuid/v4'
 import { ActivityPubActor, ActivityPubActorType } from '../../../shared/models/activitypub'
 import { ActivityPubAttributedTo } from '../../../shared/models/activitypub/objects'
-import { checkUrlsSameHost, getAPUrl } from '../../helpers/activitypub'
+import { checkUrlsSameHost, getAPId } from '../../helpers/activitypub'
 import { isActorObjectValid, normalizeActor } from '../../helpers/custom-validators/activitypub/actor'
 import { isActivityPubUrlValid } from '../../helpers/custom-validators/activitypub/misc'
 import { retryTransactionWrapper, updateInstanceWithAnother } from '../../helpers/database-utils'
@@ -13,7 +12,7 @@ import { logger } from '../../helpers/logger'
 import { createPrivateAndPublicKeys } from '../../helpers/peertube-crypto'
 import { doRequest, downloadImage } from '../../helpers/requests'
 import { getUrlFromWebfinger } from '../../helpers/webfinger'
-import { AVATARS_SIZE, CONFIG, IMAGE_MIMETYPE_EXT, sequelizeTypescript } from '../../initializers'
+import { AVATARS_SIZE, CONFIG, MIMETYPES, sequelizeTypescript } from '../../initializers'
 import { AccountModel } from '../../models/account/account'
 import { ActorModel } from '../../models/activitypub/actor'
 import { AvatarModel } from '../../models/avatar/avatar'
@@ -43,7 +42,7 @@ async function getOrCreateActorAndServerAndModel (
   recurseIfNeeded = true,
   updateCollections = false
 ) {
-  const actorUrl = getAPUrl(activityActor)
+  const actorUrl = getAPId(activityActor)
   let created = false
 
   let actor = await fetchActorByUrl(actorUrl, fetchType)
@@ -172,15 +171,13 @@ async function fetchActorTotalItems (url: string) {
 
 async function fetchAvatarIfExists (actorJSON: ActivityPubActor) {
   if (
-    actorJSON.icon && actorJSON.icon.type === 'Image' && IMAGE_MIMETYPE_EXT[actorJSON.icon.mediaType] !== undefined &&
+    actorJSON.icon && actorJSON.icon.type === 'Image' && MIMETYPES.IMAGE.MIMETYPE_EXT[actorJSON.icon.mediaType] !== undefined &&
     isActivityPubUrlValid(actorJSON.icon.url)
   ) {
-    const extension = IMAGE_MIMETYPE_EXT[actorJSON.icon.mediaType]
+    const extension = MIMETYPES.IMAGE.MIMETYPE_EXT[actorJSON.icon.mediaType]
 
     const avatarName = uuidv4() + extension
-    const destPath = join(CONFIG.STORAGE.AVATARS_DIR, avatarName)
-
-    await downloadImage(actorJSON.icon.url, destPath, AVATARS_SIZE)
+    await downloadImage(actorJSON.icon.url, CONFIG.STORAGE.AVATARS_DIR, avatarName, AVATARS_SIZE)
 
     return avatarName
   }
@@ -204,6 +201,69 @@ async function addFetchOutboxJob (actor: ActorModel) {
   return JobQueue.Instance.createJob({ type: 'activitypub-http-fetcher', payload })
 }
 
+async function refreshActorIfNeeded (
+  actorArg: ActorModel,
+  fetchedType: ActorFetchByUrlType
+): Promise<{ actor: ActorModel, refreshed: boolean }> {
+  if (!actorArg.isOutdated()) return { actor: actorArg, refreshed: false }
+
+  // We need more attributes
+  const actor = fetchedType === 'all' ? actorArg : await ActorModel.loadByUrlAndPopulateAccountAndChannel(actorArg.url)
+
+  try {
+    let actorUrl: string
+    try {
+      actorUrl = await getUrlFromWebfinger(actor.preferredUsername + '@' + actor.getHost())
+    } catch (err) {
+      logger.warn('Cannot get actor URL from webfinger, keeping the old one.', err)
+      actorUrl = actor.url
+    }
+
+    const { result, statusCode } = await fetchRemoteActor(actorUrl)
+
+    if (statusCode === 404) {
+      logger.info('Deleting actor %s because there is a 404 in refresh actor.', actor.url)
+      actor.Account ? actor.Account.destroy() : actor.VideoChannel.destroy()
+      return { actor: undefined, refreshed: false }
+    }
+
+    if (result === undefined) {
+      logger.warn('Cannot fetch remote actor in refresh actor.')
+      return { actor, refreshed: false }
+    }
+
+    return sequelizeTypescript.transaction(async t => {
+      updateInstanceWithAnother(actor, result.actor)
+
+      if (result.avatarName !== undefined) {
+        await updateActorAvatarInstance(actor, result.avatarName, t)
+      }
+
+      // Force update
+      actor.setDataValue('updatedAt', new Date())
+      await actor.save({ transaction: t })
+
+      if (actor.Account) {
+        actor.Account.set('name', result.name)
+        actor.Account.set('description', result.summary)
+
+        await actor.Account.save({ transaction: t })
+      } else if (actor.VideoChannel) {
+        actor.VideoChannel.set('name', result.name)
+        actor.VideoChannel.set('description', result.summary)
+        actor.VideoChannel.set('support', result.support)
+
+        await actor.VideoChannel.save({ transaction: t })
+      }
+
+      return { refreshed: true, actor }
+    })
+  } catch (err) {
+    logger.warn('Cannot refresh actor.', { err })
+    return { actor, refreshed: false }
+  }
+}
+
 export {
   getOrCreateActorAndServerAndModel,
   buildActorInstance,
@@ -211,6 +271,7 @@ export {
   fetchActorTotalItems,
   fetchAvatarIfExists,
   updateActorInstance,
+  refreshActorIfNeeded,
   updateActorAvatarInstance,
   addFetchOutboxJob
 }
@@ -299,7 +360,7 @@ async function fetchRemoteActor (actorUrl: string): Promise<{ statusCode?: numbe
 
   const actorJSON: ActivityPubActor = requestResult.body
   if (isActorObjectValid(actorJSON) === false) {
-    logger.debug('Remote actor JSON is not valid.', { actorJSON: actorJSON })
+    logger.debug('Remote actor JSON is not valid.', { actorJSON })
     return { result: undefined, statusCode: requestResult.response.statusCode }
   }
 
@@ -375,59 +436,3 @@ async function saveVideoChannel (actor: ActorModel, result: FetchRemoteActorResu
 
   return videoChannelCreated
 }
-
-async function refreshActorIfNeeded (
-  actorArg: ActorModel,
-  fetchedType: ActorFetchByUrlType
-): Promise<{ actor: ActorModel, refreshed: boolean }> {
-  if (!actorArg.isOutdated()) return { actor: actorArg, refreshed: false }
-
-  // We need more attributes
-  const actor = fetchedType === 'all' ? actorArg : await ActorModel.loadByUrlAndPopulateAccountAndChannel(actorArg.url)
-
-  try {
-    const actorUrl = await getUrlFromWebfinger(actor.preferredUsername + '@' + actor.getHost())
-    const { result, statusCode } = await fetchRemoteActor(actorUrl)
-
-    if (statusCode === 404) {
-      logger.info('Deleting actor %s because there is a 404 in refresh actor.', actor.url)
-      actor.Account ? actor.Account.destroy() : actor.VideoChannel.destroy()
-      return { actor: undefined, refreshed: false }
-    }
-
-    if (result === undefined) {
-      logger.warn('Cannot fetch remote actor in refresh actor.')
-      return { actor, refreshed: false }
-    }
-
-    return sequelizeTypescript.transaction(async t => {
-      updateInstanceWithAnother(actor, result.actor)
-
-      if (result.avatarName !== undefined) {
-        await updateActorAvatarInstance(actor, result.avatarName, t)
-      }
-
-      // Force update
-      actor.setDataValue('updatedAt', new Date())
-      await actor.save({ transaction: t })
-
-      if (actor.Account) {
-        actor.Account.set('name', result.name)
-        actor.Account.set('description', result.summary)
-
-        await actor.Account.save({ transaction: t })
-      } else if (actor.VideoChannel) {
-        actor.VideoChannel.set('name', result.name)
-        actor.VideoChannel.set('description', result.summary)
-        actor.VideoChannel.set('support', result.support)
-
-        await actor.VideoChannel.save({ transaction: t })
-      }
-
-      return { refreshed: true, actor }
-    })
-  } catch (err) {
-    logger.warn('Cannot refresh actor.', { err })
-    return { actor, refreshed: false }
-  }
-}
diff --git a/server/lib/activitypub/process/process-accept.ts b/server/lib/activitypub/process/process-accept.ts
index 89bda9c32..ebb275e34 100644
--- a/server/lib/activitypub/process/process-accept.ts
+++ b/server/lib/activitypub/process/process-accept.ts
@@ -24,6 +24,7 @@ async function processAccept (actor: ActorModel, targetActor: ActorModel) {
   if (follow.state !== 'accepted') {
     follow.set('state', 'accepted')
     await follow.save()
+
     await addFetchOutboxJob(targetActor)
   }
 }
diff --git a/server/lib/activitypub/process/process-announce.ts b/server/lib/activitypub/process/process-announce.ts
index cc88b5423..23310b41e 100644
--- a/server/lib/activitypub/process/process-announce.ts
+++ b/server/lib/activitypub/process/process-announce.ts
@@ -5,6 +5,8 @@ import { ActorModel } from '../../../models/activitypub/actor'
 import { VideoShareModel } from '../../../models/video/video-share'
 import { forwardVideoRelatedActivity } from '../send/utils'
 import { getOrCreateVideoAndAccountAndChannel } from '../videos'
+import { VideoPrivacy } from '../../../../shared/models/videos'
+import { Notifier } from '../../notifier'
 
 async function processAnnounceActivity (activity: ActivityAnnounce, actorAnnouncer: ActorModel) {
   return retryTransactionWrapper(processVideoShare, actorAnnouncer, activity)
@@ -21,9 +23,9 @@ export {
 async function processVideoShare (actorAnnouncer: ActorModel, activity: ActivityAnnounce) {
   const objectUri = typeof activity.object === 'string' ? activity.object : activity.object.id
 
-  const { video } = await getOrCreateVideoAndAccountAndChannel({ videoObject: objectUri })
+  const { video, created: videoCreated } = await getOrCreateVideoAndAccountAndChannel({ videoObject: objectUri })
 
-  return sequelizeTypescript.transaction(async t => {
+  await sequelizeTypescript.transaction(async t => {
     // Add share entry
 
     const share = {
@@ -49,4 +51,6 @@ async function processVideoShare (actorAnnouncer: ActorModel, activity: Activity
 
     return undefined
   })
+
+  if (videoCreated) Notifier.Instance.notifyOnNewVideo(video)
 }
diff --git a/server/lib/activitypub/process/process-create.ts b/server/lib/activitypub/process/process-create.ts
index cd7ea01aa..5f4d793a5 100644
--- a/server/lib/activitypub/process/process-create.ts
+++ b/server/lib/activitypub/process/process-create.ts
@@ -1,36 +1,44 @@
-import { ActivityCreate, CacheFileObject, VideoAbuseState, VideoTorrentObject } from '../../../../shared'
-import { DislikeObject, VideoAbuseObject, ViewObject } from '../../../../shared/models/activitypub/objects'
+import { ActivityCreate, CacheFileObject, VideoTorrentObject } from '../../../../shared'
 import { VideoCommentObject } from '../../../../shared/models/activitypub/objects/video-comment-object'
 import { retryTransactionWrapper } from '../../../helpers/database-utils'
 import { logger } from '../../../helpers/logger'
 import { sequelizeTypescript } from '../../../initializers'
-import { AccountVideoRateModel } from '../../../models/account/account-video-rate'
 import { ActorModel } from '../../../models/activitypub/actor'
-import { VideoAbuseModel } from '../../../models/video/video-abuse'
 import { addVideoComment, resolveThread } from '../video-comments'
 import { getOrCreateVideoAndAccountAndChannel } from '../videos'
 import { forwardVideoRelatedActivity } from '../send/utils'
-import { Redis } from '../../redis'
 import { createOrUpdateCacheFile } from '../cache-file'
-import { getVideoDislikeActivityPubUrl } from '../url'
-import { VideoModel } from '../../../models/video/video'
+import { Notifier } from '../../notifier'
+import { processViewActivity } from './process-view'
+import { processDislikeActivity } from './process-dislike'
+import { processFlagActivity } from './process-flag'
 
 async function processCreateActivity (activity: ActivityCreate, byActor: ActorModel) {
   const activityObject = activity.object
   const activityType = activityObject.type
 
   if (activityType === 'View') {
-    return processCreateView(byActor, activity)
-  } else if (activityType === 'Dislike') {
-    return retryTransactionWrapper(processCreateDislike, byActor, activity)
-  } else if (activityType === 'Video') {
+    return processViewActivity(activity, byActor)
+  }
+
+  if (activityType === 'Dislike') {
+    return retryTransactionWrapper(processDislikeActivity, activity, byActor)
+  }
+
+  if (activityType === 'Flag') {
+    return retryTransactionWrapper(processFlagActivity, activity, byActor)
+  }
+
+  if (activityType === 'Video') {
     return processCreateVideo(activity)
-  } else if (activityType === 'Flag') {
-    return retryTransactionWrapper(processCreateVideoAbuse, byActor, activityObject as VideoAbuseObject)
-  } else if (activityType === 'Note') {
-    return retryTransactionWrapper(processCreateVideoComment, byActor, activity)
-  } else if (activityType === 'CacheFile') {
-    return retryTransactionWrapper(processCacheFile, byActor, activity)
+  }
+
+  if (activityType === 'Note') {
+    return retryTransactionWrapper(processCreateVideoComment, activity, byActor)
+  }
+
+  if (activityType === 'CacheFile') {
+    return retryTransactionWrapper(processCacheFile, activity, byActor)
   }
 
   logger.warn('Unknown activity object type %s when creating activity.', activityType, { activity: activity.id })
@@ -48,61 +56,14 @@ export {
 async function processCreateVideo (activity: ActivityCreate) {
   const videoToCreateData = activity.object as VideoTorrentObject
 
-  const { video } = await getOrCreateVideoAndAccountAndChannel({ videoObject: videoToCreateData })
+  const { video, created } = await getOrCreateVideoAndAccountAndChannel({ videoObject: videoToCreateData })
 
-  return video
-}
-
-async function processCreateDislike (byActor: ActorModel, activity: ActivityCreate) {
-  const dislike = activity.object as DislikeObject
-  const byAccount = byActor.Account
-
-  if (!byAccount) throw new Error('Cannot create dislike with the non account actor ' + byActor.url)
-
-  const { video } = await getOrCreateVideoAndAccountAndChannel({ videoObject: dislike.object })
+  if (created) Notifier.Instance.notifyOnNewVideo(video)
 
-  return sequelizeTypescript.transaction(async t => {
-    const rate = {
-      type: 'dislike' as 'dislike',
-      videoId: video.id,
-      accountId: byAccount.id
-    }
-
-    const [ , created ] = await AccountVideoRateModel.findOrCreate({
-      where: rate,
-      defaults: Object.assign({}, rate, { url: getVideoDislikeActivityPubUrl(byActor, video) }),
-      transaction: t
-    })
-    if (created === true) await video.increment('dislikes', { transaction: t })
-
-    if (video.isOwned() && created === true) {
-      // Don't resend the activity to the sender
-      const exceptions = [ byActor ]
-
-      await forwardVideoRelatedActivity(activity, t, exceptions, video)
-    }
-  })
-}
-
-async function processCreateView (byActor: ActorModel, activity: ActivityCreate) {
-  const view = activity.object as ViewObject
-
-  const options = {
-    videoObject: view.object,
-    fetchType: 'only-video' as 'only-video'
-  }
-  const { video } = await getOrCreateVideoAndAccountAndChannel(options)
-
-  await Redis.Instance.addVideoView(video.id)
-
-  if (video.isOwned()) {
-    // Don't resend the activity to the sender
-    const exceptions = [ byActor ]
-    await forwardVideoRelatedActivity(activity, undefined, exceptions, video)
-  }
+  return video
 }
 
-async function processCacheFile (byActor: ActorModel, activity: ActivityCreate) {
+async function processCacheFile (activity: ActivityCreate, byActor: ActorModel) {
   const cacheFile = activity.object as CacheFileObject
 
   const { video } = await getOrCreateVideoAndAccountAndChannel({ videoObject: cacheFile.object })
@@ -118,29 +79,7 @@ async function processCacheFile (byActor: ActorModel, activity: ActivityCreate)
   }
 }
 
-async function processCreateVideoAbuse (byActor: ActorModel, videoAbuseToCreateData: VideoAbuseObject) {
-  logger.debug('Reporting remote abuse for video %s.', videoAbuseToCreateData.object)
-
-  const account = byActor.Account
-  if (!account) throw new Error('Cannot create dislike with the non account actor ' + byActor.url)
-
-  const { video } = await getOrCreateVideoAndAccountAndChannel({ videoObject: videoAbuseToCreateData.object })
-
-  return sequelizeTypescript.transaction(async t => {
-    const videoAbuseData = {
-      reporterAccountId: account.id,
-      reason: videoAbuseToCreateData.content,
-      videoId: video.id,
-      state: VideoAbuseState.PENDING
-    }
-
-    await VideoAbuseModel.create(videoAbuseData, { transaction: t })
-
-    logger.info('Remote abuse for video uuid %s created', videoAbuseToCreateData.object)
-  })
-}
-
-async function processCreateVideoComment (byActor: ActorModel, activity: ActivityCreate) {
+async function processCreateVideoComment (activity: ActivityCreate, byActor: ActorModel) {
   const commentObject = activity.object as VideoCommentObject
   const byAccount = byActor.Account
 
@@ -148,7 +87,7 @@ async function processCreateVideoComment (byActor: ActorModel, activity: Activit
 
   const { video } = await resolveThread(commentObject.inReplyTo)
 
-  const { created } = await addVideoComment(video, commentObject.id)
+  const { comment, created } = await addVideoComment(video, commentObject.id)
 
   if (video.isOwned() && created === true) {
     // Don't resend the activity to the sender
@@ -156,4 +95,6 @@ async function processCreateVideoComment (byActor: ActorModel, activity: Activit
 
     await forwardVideoRelatedActivity(activity, undefined, exceptions, video)
   }
+
+  if (created === true) Notifier.Instance.notifyOnNewComment(comment)
 }
diff --git a/server/lib/activitypub/process/process-dislike.ts b/server/lib/activitypub/process/process-dislike.ts
new file mode 100644
index 000000000..bfd69e07a
--- /dev/null
+++ b/server/lib/activitypub/process/process-dislike.ts
@@ -0,0 +1,52 @@
+import { ActivityCreate, ActivityDislike } from '../../../../shared'
+import { DislikeObject } from '../../../../shared/models/activitypub/objects'
+import { retryTransactionWrapper } from '../../../helpers/database-utils'
+import { sequelizeTypescript } from '../../../initializers'
+import { AccountVideoRateModel } from '../../../models/account/account-video-rate'
+import { ActorModel } from '../../../models/activitypub/actor'
+import { getOrCreateVideoAndAccountAndChannel } from '../videos'
+import { forwardVideoRelatedActivity } from '../send/utils'
+import { getVideoDislikeActivityPubUrl } from '../url'
+
+async function processDislikeActivity (activity: ActivityCreate | ActivityDislike, byActor: ActorModel) {
+  return retryTransactionWrapper(processDislike, activity, byActor)
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  processDislikeActivity
+}
+
+// ---------------------------------------------------------------------------
+
+async function processDislike (activity: ActivityCreate | ActivityDislike, byActor: ActorModel) {
+  const dislikeObject = activity.type === 'Dislike' ? activity.object : (activity.object as DislikeObject).object
+  const byAccount = byActor.Account
+
+  if (!byAccount) throw new Error('Cannot create dislike with the non account actor ' + byActor.url)
+
+  const { video } = await getOrCreateVideoAndAccountAndChannel({ videoObject: dislikeObject })
+
+  return sequelizeTypescript.transaction(async t => {
+    const rate = {
+      type: 'dislike' as 'dislike',
+      videoId: video.id,
+      accountId: byAccount.id
+    }
+
+    const [ , created ] = await AccountVideoRateModel.findOrCreate({
+      where: rate,
+      defaults: Object.assign({}, rate, { url: getVideoDislikeActivityPubUrl(byActor, video) }),
+      transaction: t
+    })
+    if (created === true) await video.increment('dislikes', { transaction: t })
+
+    if (video.isOwned() && created === true) {
+      // Don't resend the activity to the sender
+      const exceptions = [ byActor ]
+
+      await forwardVideoRelatedActivity(activity, t, exceptions, video)
+    }
+  })
+}
diff --git a/server/lib/activitypub/process/process-flag.ts b/server/lib/activitypub/process/process-flag.ts
new file mode 100644
index 000000000..79ce6fb41
--- /dev/null
+++ b/server/lib/activitypub/process/process-flag.ts
@@ -0,0 +1,49 @@
+import { ActivityCreate, ActivityFlag, VideoAbuseState } from '../../../../shared'
+import { VideoAbuseObject } from '../../../../shared/models/activitypub/objects'
+import { retryTransactionWrapper } from '../../../helpers/database-utils'
+import { logger } from '../../../helpers/logger'
+import { sequelizeTypescript } from '../../../initializers'
+import { ActorModel } from '../../../models/activitypub/actor'
+import { VideoAbuseModel } from '../../../models/video/video-abuse'
+import { getOrCreateVideoAndAccountAndChannel } from '../videos'
+import { Notifier } from '../../notifier'
+import { getAPId } from '../../../helpers/activitypub'
+
+async function processFlagActivity (activity: ActivityCreate | ActivityFlag, byActor: ActorModel) {
+  return retryTransactionWrapper(processCreateVideoAbuse, activity, byActor)
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  processFlagActivity
+}
+
+// ---------------------------------------------------------------------------
+
+async function processCreateVideoAbuse (activity: ActivityCreate | ActivityFlag, byActor: ActorModel) {
+  const flag = activity.type === 'Flag' ? activity : (activity.object as VideoAbuseObject)
+
+  logger.debug('Reporting remote abuse for video %s.', getAPId(flag.object))
+
+  const account = byActor.Account
+  if (!account) throw new Error('Cannot create dislike with the non account actor ' + byActor.url)
+
+  const { video } = await getOrCreateVideoAndAccountAndChannel({ videoObject: flag.object })
+
+  return sequelizeTypescript.transaction(async t => {
+    const videoAbuseData = {
+      reporterAccountId: account.id,
+      reason: flag.content,
+      videoId: video.id,
+      state: VideoAbuseState.PENDING
+    }
+
+    const videoAbuseInstance = await VideoAbuseModel.create(videoAbuseData, { transaction: t })
+    videoAbuseInstance.Video = video
+
+    Notifier.Instance.notifyOnNewVideoAbuse(videoAbuseInstance)
+
+    logger.info('Remote abuse for video uuid %s created', flag.object)
+  })
+}
diff --git a/server/lib/activitypub/process/process-follow.ts b/server/lib/activitypub/process/process-follow.ts
index 24c9085f7..0cd537187 100644
--- a/server/lib/activitypub/process/process-follow.ts
+++ b/server/lib/activitypub/process/process-follow.ts
@@ -5,9 +5,11 @@ import { sequelizeTypescript } from '../../../initializers'
 import { ActorModel } from '../../../models/activitypub/actor'
 import { ActorFollowModel } from '../../../models/activitypub/actor-follow'
 import { sendAccept } from '../send'
+import { Notifier } from '../../notifier'
+import { getAPId } from '../../../helpers/activitypub'
 
 async function processFollowActivity (activity: ActivityFollow, byActor: ActorModel) {
-  const activityObject = activity.object
+  const activityObject = getAPId(activity.object)
 
   return retryTransactionWrapper(processFollow, byActor, activityObject)
 }
@@ -21,13 +23,13 @@ export {
 // ---------------------------------------------------------------------------
 
 async function processFollow (actor: ActorModel, targetActorURL: string) {
-  await sequelizeTypescript.transaction(async t => {
+  const { actorFollow, created } = await sequelizeTypescript.transaction(async t => {
     const targetActor = await ActorModel.loadByUrlAndPopulateAccountAndChannel(targetActorURL, t)
 
     if (!targetActor) throw new Error('Unknown actor')
     if (targetActor.isOwned() === false) throw new Error('This is not a local actor.')
 
-    const [ actorFollow ] = await ActorFollowModel.findOrCreate({
+    const [ actorFollow, created ] = await ActorFollowModel.findOrCreate({
       where: {
         actorId: actor.id,
         targetActorId: targetActor.id
@@ -52,8 +54,12 @@ async function processFollow (actor: ActorModel, targetActorURL: string) {
     actorFollow.ActorFollowing = targetActor
 
     // Target sends to actor he accepted the follow request
-    return sendAccept(actorFollow)
+    await sendAccept(actorFollow)
+
+    return { actorFollow, created }
   })
 
+  if (created) Notifier.Instance.notifyOfNewFollow(actorFollow)
+
   logger.info('Actor %s is followed by actor %s.', targetActorURL, actor.url)
 }
diff --git a/server/lib/activitypub/process/process-like.ts b/server/lib/activitypub/process/process-like.ts
index e8e97eece..2a04167d7 100644
--- a/server/lib/activitypub/process/process-like.ts
+++ b/server/lib/activitypub/process/process-like.ts
@@ -6,6 +6,7 @@ import { ActorModel } from '../../../models/activitypub/actor'
 import { forwardVideoRelatedActivity } from '../send/utils'
 import { getOrCreateVideoAndAccountAndChannel } from '../videos'
 import { getVideoLikeActivityPubUrl } from '../url'
+import { getAPId } from '../../../helpers/activitypub'
 
 async function processLikeActivity (activity: ActivityLike, byActor: ActorModel) {
   return retryTransactionWrapper(processLikeVideo, byActor, activity)
@@ -20,7 +21,7 @@ export {
 // ---------------------------------------------------------------------------
 
 async function processLikeVideo (byActor: ActorModel, activity: ActivityLike) {
-  const videoUrl = activity.object
+  const videoUrl = getAPId(activity.object)
 
   const byAccount = byActor.Account
   if (!byAccount) throw new Error('Cannot create like with the non account actor ' + byActor.url)
diff --git a/server/lib/activitypub/process/process-undo.ts b/server/lib/activitypub/process/process-undo.ts
index 438a013b6..ed0177a67 100644
--- a/server/lib/activitypub/process/process-undo.ts
+++ b/server/lib/activitypub/process/process-undo.ts
@@ -26,6 +26,10 @@ async function processUndoActivity (activity: ActivityUndo, byActor: ActorModel)
     }
   }
 
+  if (activityToUndo.type === 'Dislike') {
+    return retryTransactionWrapper(processUndoDislike, byActor, activity)
+  }
+
   if (activityToUndo.type === 'Follow') {
     return retryTransactionWrapper(processUndoFollow, byActor, activityToUndo)
   }
@@ -72,7 +76,9 @@ async function processUndoLike (byActor: ActorModel, activity: ActivityUndo) {
 }
 
 async function processUndoDislike (byActor: ActorModel, activity: ActivityUndo) {
-  const dislike = activity.object.object as DislikeObject
+  const dislike = activity.object.type === 'Dislike'
+    ? activity.object
+    : activity.object.object as DislikeObject
 
   const { video } = await getOrCreateVideoAndAccountAndChannel({ videoObject: dislike.object })
 
diff --git a/server/lib/activitypub/process/process-update.ts b/server/lib/activitypub/process/process-update.ts
index 03831a00e..c6b42d846 100644
--- a/server/lib/activitypub/process/process-update.ts
+++ b/server/lib/activitypub/process/process-update.ts
@@ -51,7 +51,7 @@ async function processUpdateVideo (actor: ActorModel, activity: ActivityUpdate)
     return undefined
   }
 
-  const { video } = await getOrCreateVideoAndAccountAndChannel({ videoObject: videoObject.id })
+  const { video } = await getOrCreateVideoAndAccountAndChannel({ videoObject: videoObject.id, allowRefresh: false })
   const channelActor = await getOrCreateVideoChannelFromVideoObject(videoObject)
 
   const updateOptions = {
diff --git a/server/lib/activitypub/process/process-view.ts b/server/lib/activitypub/process/process-view.ts
new file mode 100644
index 000000000..8f66d3630
--- /dev/null
+++ b/server/lib/activitypub/process/process-view.ts
@@ -0,0 +1,35 @@
+import { ActorModel } from '../../../models/activitypub/actor'
+import { getOrCreateVideoAndAccountAndChannel } from '../videos'
+import { forwardVideoRelatedActivity } from '../send/utils'
+import { Redis } from '../../redis'
+import { ActivityCreate, ActivityView, ViewObject } from '../../../../shared/models/activitypub'
+
+async function processViewActivity (activity: ActivityView | ActivityCreate, byActor: ActorModel) {
+  return processCreateView(activity, byActor)
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  processViewActivity
+}
+
+// ---------------------------------------------------------------------------
+
+async function processCreateView (activity: ActivityView | ActivityCreate, byActor: ActorModel) {
+  const videoObject = activity.type === 'View' ? activity.object : (activity.object as ViewObject).object
+
+  const options = {
+    videoObject: videoObject,
+    fetchType: 'only-video' as 'only-video'
+  }
+  const { video } = await getOrCreateVideoAndAccountAndChannel(options)
+
+  await Redis.Instance.addVideoView(video.id)
+
+  if (video.isOwned()) {
+    // Don't resend the activity to the sender
+    const exceptions = [ byActor ]
+    await forwardVideoRelatedActivity(activity, undefined, exceptions, video)
+  }
+}
diff --git a/server/lib/activitypub/process/process.ts b/server/lib/activitypub/process/process.ts
index bcc5cac7a..9dd241402 100644
--- a/server/lib/activitypub/process/process.ts
+++ b/server/lib/activitypub/process/process.ts
@@ -1,5 +1,5 @@
 import { Activity, ActivityType } from '../../../../shared/models/activitypub'
-import { checkUrlsSameHost, getAPUrl } from '../../../helpers/activitypub'
+import { checkUrlsSameHost, getAPId } from '../../../helpers/activitypub'
 import { logger } from '../../../helpers/logger'
 import { ActorModel } from '../../../models/activitypub/actor'
 import { processAcceptActivity } from './process-accept'
@@ -12,6 +12,9 @@ import { processRejectActivity } from './process-reject'
 import { processUndoActivity } from './process-undo'
 import { processUpdateActivity } from './process-update'
 import { getOrCreateActorAndServerAndModel } from '../actor'
+import { processDislikeActivity } from './process-dislike'
+import { processFlagActivity } from './process-flag'
+import { processViewActivity } from './process-view'
 
 const processActivity: { [ P in ActivityType ]: (activity: Activity, byActor: ActorModel, inboxActor?: ActorModel) => Promise<any> } = {
   Create: processCreateActivity,
@@ -22,7 +25,10 @@ const processActivity: { [ P in ActivityType ]: (activity: Activity, byActor: Ac
   Reject: processRejectActivity,
   Announce: processAnnounceActivity,
   Undo: processUndoActivity,
-  Like: processLikeActivity
+  Like: processLikeActivity,
+  Dislike: processDislikeActivity,
+  Flag: processFlagActivity,
+  View: processViewActivity
 }
 
 async function processActivities (
@@ -35,12 +41,12 @@ async function processActivities (
   const actorsCache: { [ url: string ]: ActorModel } = {}
 
   for (const activity of activities) {
-    if (!options.signatureActor && [ 'Create', 'Announce', 'Like' ].indexOf(activity.type) === -1) {
+    if (!options.signatureActor && [ 'Create', 'Announce', 'Like' ].includes(activity.type) === false) {
       logger.error('Cannot process activity %s (type: %s) without the actor signature.', activity.id, activity.type)
       continue
     }
 
-    const actorUrl = getAPUrl(activity.actor)
+    const actorUrl = getAPId(activity.actor)
 
     // When we fetch remote data, we don't have signature
     if (options.signatureActor && actorUrl !== options.signatureActor.url) {
diff --git a/server/lib/activitypub/share.ts b/server/lib/activitypub/share.ts
index 5dcba778c..1767df0ae 100644
--- a/server/lib/activitypub/share.ts
+++ b/server/lib/activitypub/share.ts
@@ -11,7 +11,7 @@ import { doRequest } from '../../helpers/requests'
 import { getOrCreateActorAndServerAndModel } from './actor'
 import { logger } from '../../helpers/logger'
 import { CRAWL_REQUEST_CONCURRENCY } from '../../initializers'
-import { checkUrlsSameHost, getAPUrl } from '../../helpers/activitypub'
+import { checkUrlsSameHost, getAPId } from '../../helpers/activitypub'
 
 async function shareVideoByServerAndChannel (video: VideoModel, t: Transaction) {
   if (video.privacy === VideoPrivacy.PRIVATE) return undefined
@@ -41,7 +41,7 @@ async function addVideoShares (shareUrls: string[], instance: VideoModel) {
       })
       if (!body || !body.actor) throw new Error('Body or body actor is invalid')
 
-      const actorUrl = getAPUrl(body.actor)
+      const actorUrl = getAPId(body.actor)
       if (checkUrlsSameHost(shareUrl, actorUrl) !== true) {
         throw new Error(`Actor url ${actorUrl} has not the same host than the share url ${shareUrl}`)
       }
@@ -78,7 +78,7 @@ async function shareByServer (video: VideoModel, t: Transaction) {
   const serverActor = await getServerActor()
 
   const serverShareUrl = getVideoAnnounceActivityPubUrl(serverActor, video)
-  return VideoShareModel.findOrCreate({
+  const [ serverShare ] = await VideoShareModel.findOrCreate({
     defaults: {
       actorId: serverActor.id,
       videoId: video.id,
@@ -88,16 +88,14 @@ async function shareByServer (video: VideoModel, t: Transaction) {
       url: serverShareUrl
     },
     transaction: t
-  }).then(([ serverShare, created ]) => {
-    if (created) return sendVideoAnnounce(serverActor, serverShare, video, t)
-
-    return undefined
   })
+
+  return sendVideoAnnounce(serverActor, serverShare, video, t)
 }
 
 async function shareByVideoChannel (video: VideoModel, t: Transaction) {
   const videoChannelShareUrl = getVideoAnnounceActivityPubUrl(video.VideoChannel.Actor, video)
-  return VideoShareModel.findOrCreate({
+  const [ videoChannelShare ] = await VideoShareModel.findOrCreate({
     defaults: {
       actorId: video.VideoChannel.actorId,
       videoId: video.id,
@@ -107,11 +105,9 @@ async function shareByVideoChannel (video: VideoModel, t: Transaction) {
       url: videoChannelShareUrl
     },
     transaction: t
-  }).then(([ videoChannelShare, created ]) => {
-    if (created) return sendVideoAnnounce(video.VideoChannel.Actor, videoChannelShare, video, t)
-
-    return undefined
   })
+
+  return sendVideoAnnounce(video.VideoChannel.Actor, videoChannelShare, video, t)
 }
 
 async function undoShareByVideoChannel (video: VideoModel, oldVideoChannel: VideoChannelModel, t: Transaction) {
diff --git a/server/lib/activitypub/video-comments.ts b/server/lib/activitypub/video-comments.ts
index 5868e7297..e87301fe7 100644
--- a/server/lib/activitypub/video-comments.ts
+++ b/server/lib/activitypub/video-comments.ts
@@ -70,7 +70,7 @@ async function addVideoComment (videoInstance: VideoModel, commentUrl: string) {
     throw new Error(`Comment url ${commentUrl} host is different from the AP object id ${body.id}`)
   }
 
-  const actor = await getOrCreateActorAndServerAndModel(actorUrl)
+  const actor = await getOrCreateActorAndServerAndModel(actorUrl, 'all')
   const entry = await videoCommentActivityObjectToDBAttributes(videoInstance, actor, body)
   if (!entry) return { created: false }
 
@@ -80,6 +80,8 @@ async function addVideoComment (videoInstance: VideoModel, commentUrl: string) {
     },
     defaults: entry
   })
+  comment.Account = actor.Account
+  comment.Video = videoInstance
 
   return { comment, created }
 }
diff --git a/server/lib/activitypub/video-rates.ts b/server/lib/activitypub/video-rates.ts
index 2cce67f0c..45a2b22ea 100644
--- a/server/lib/activitypub/video-rates.ts
+++ b/server/lib/activitypub/video-rates.ts
@@ -9,7 +9,7 @@ import { AccountVideoRateModel } from '../../models/account/account-video-rate'
 import { logger } from '../../helpers/logger'
 import { CRAWL_REQUEST_CONCURRENCY } from '../../initializers'
 import { doRequest } from '../../helpers/requests'
-import { checkUrlsSameHost, getAPUrl } from '../../helpers/activitypub'
+import { checkUrlsSameHost, getAPId } from '../../helpers/activitypub'
 import { ActorModel } from '../../models/activitypub/actor'
 import { getVideoDislikeActivityPubUrl, getVideoLikeActivityPubUrl } from './url'
 
@@ -26,7 +26,7 @@ async function createRates (ratesUrl: string[], video: VideoModel, rate: VideoRa
       })
       if (!body || !body.actor) throw new Error('Body or body actor is invalid')
 
-      const actorUrl = getAPUrl(body.actor)
+      const actorUrl = getAPId(body.actor)
       if (checkUrlsSameHost(actorUrl, rateUrl) !== true) {
         throw new Error(`Rate url ${rateUrl} has not the same host than actor url ${actorUrl}`)
       }
diff --git a/server/lib/activitypub/videos.ts b/server/lib/activitypub/videos.ts
index 998f90330..e1e523499 100644
--- a/server/lib/activitypub/videos.ts
+++ b/server/lib/activitypub/videos.ts
@@ -1,7 +1,6 @@
 import * as Bluebird from 'bluebird'
 import * as sequelize from 'sequelize'
 import * as magnetUtil from 'magnet-uri'
-import { join } from 'path'
 import * as request from 'request'
 import { ActivityIconObject, ActivityUrlObject, ActivityVideoUrlObject, VideoState } from '../../../shared/index'
 import { VideoTorrentObject } from '../../../shared/models/activitypub/objects'
@@ -11,7 +10,7 @@ import { isVideoFileInfoHashValid } from '../../helpers/custom-validators/videos
 import { resetSequelizeInstance, retryTransactionWrapper } from '../../helpers/database-utils'
 import { logger } from '../../helpers/logger'
 import { doRequest, downloadImage } from '../../helpers/requests'
-import { ACTIVITY_PUB, CONFIG, REMOTE_SCHEME, sequelizeTypescript, THUMBNAILS_SIZE, VIDEO_MIMETYPE_EXT } from '../../initializers'
+import { ACTIVITY_PUB, CONFIG, MIMETYPES, REMOTE_SCHEME, sequelizeTypescript, THUMBNAILS_SIZE } from '../../initializers'
 import { ActorModel } from '../../models/activitypub/actor'
 import { TagModel } from '../../models/video/tag'
 import { VideoModel } from '../../models/video/video'
@@ -29,7 +28,8 @@ import { createRates } from './video-rates'
 import { addVideoShares, shareVideoByServerAndChannel } from './share'
 import { AccountModel } from '../../models/account/account'
 import { fetchVideoByUrl, VideoFetchByUrlType } from '../../helpers/video'
-import { checkUrlsSameHost, getAPUrl } from '../../helpers/activitypub'
+import { checkUrlsSameHost, getAPId } from '../../helpers/activitypub'
+import { Notifier } from '../notifier'
 
 async function federateVideoIfNeeded (video: VideoModel, isNewVideo: boolean, transaction?: sequelize.Transaction) {
   // If the video is not private and published, we federate it
@@ -95,9 +95,8 @@ function fetchRemoteVideoStaticFile (video: VideoModel, path: string, reject: Fu
 
 function generateThumbnailFromUrl (video: VideoModel, icon: ActivityIconObject) {
   const thumbnailName = video.getThumbnailName()
-  const thumbnailPath = join(CONFIG.STORAGE.THUMBNAILS_DIR, thumbnailName)
 
-  return downloadImage(icon.url, thumbnailPath, THUMBNAILS_SIZE)
+  return downloadImage(icon.url, CONFIG.STORAGE.THUMBNAILS_DIR, thumbnailName, THUMBNAILS_SIZE)
 }
 
 function getOrCreateVideoChannelFromVideoObject (videoObject: VideoTorrentObject) {
@@ -156,29 +155,34 @@ async function syncVideoExternalAttributes (video: VideoModel, fetchedVideo: Vid
 }
 
 async function getOrCreateVideoAndAccountAndChannel (options: {
-  videoObject: VideoTorrentObject | string,
+  videoObject: { id: string } | string,
   syncParam?: SyncParam,
-  fetchType?: VideoFetchByUrlType
+  fetchType?: VideoFetchByUrlType,
+  allowRefresh?: boolean // true by default
 }) {
   // Default params
   const syncParam = options.syncParam || { likes: true, dislikes: true, shares: true, comments: true, thumbnail: true, refreshVideo: false }
   const fetchType = options.fetchType || 'all'
+  const allowRefresh = options.allowRefresh !== false
 
   // Get video url
-  const videoUrl = getAPUrl(options.videoObject)
+  const videoUrl = getAPId(options.videoObject)
 
   let videoFromDatabase = await fetchVideoByUrl(videoUrl, fetchType)
   if (videoFromDatabase) {
-    const refreshOptions = {
-      video: videoFromDatabase,
-      fetchedType: fetchType,
-      syncParam
-    }
 
-    if (syncParam.refreshVideo === true) videoFromDatabase = await refreshVideoIfNeeded(refreshOptions)
-    else await JobQueue.Instance.createJob({ type: 'activitypub-refresher', payload: { type: 'video', videoUrl: videoFromDatabase.url } })
+    if (allowRefresh === true) {
+      const refreshOptions = {
+        video: videoFromDatabase,
+        fetchedType: fetchType,
+        syncParam
+      }
+
+      if (syncParam.refreshVideo === true) videoFromDatabase = await refreshVideoIfNeeded(refreshOptions)
+      else await JobQueue.Instance.createJob({ type: 'activitypub-refresher', payload: { type: 'video', url: videoFromDatabase.url } })
+    }
 
-    return { video: videoFromDatabase }
+    return { video: videoFromDatabase, created: false }
   }
 
   const { videoObject: fetchedVideo } = await fetchRemoteVideo(videoUrl)
@@ -189,7 +193,7 @@ async function getOrCreateVideoAndAccountAndChannel (options: {
 
   await syncVideoExternalAttributes(video, fetchedVideo, syncParam)
 
-  return { video }
+  return { video, created: true }
 }
 
 async function updateVideoFromAP (options: {
@@ -200,13 +204,14 @@ async function updateVideoFromAP (options: {
   overrideTo?: string[]
 }) {
   logger.debug('Updating remote video "%s".', options.videoObject.uuid)
+
   let videoFieldsSave: any
+  const wasPrivateVideo = options.video.privacy === VideoPrivacy.PRIVATE
+  const wasUnlistedVideo = options.video.privacy === VideoPrivacy.UNLISTED
 
   try {
     await sequelizeTypescript.transaction(async t => {
-      const sequelizeOptions = {
-        transaction: t
-      }
+      const sequelizeOptions = { transaction: t }
 
       videoFieldsSave = options.video.toJSON()
 
@@ -276,6 +281,11 @@ async function updateVideoFromAP (options: {
       }
     })
 
+    // Notify our users?
+    if (wasPrivateVideo || wasUnlistedVideo) {
+      Notifier.Instance.notifyOnNewVideo(options.video)
+    }
+
     logger.info('Remote video with uuid %s updated', options.videoObject.uuid)
   } catch (err) {
     if (options.video !== undefined && videoFieldsSave !== undefined) {
@@ -358,7 +368,7 @@ export {
 // ---------------------------------------------------------------------------
 
 function isActivityVideoUrlObject (url: ActivityUrlObject): url is ActivityVideoUrlObject {
-  const mimeTypes = Object.keys(VIDEO_MIMETYPE_EXT)
+  const mimeTypes = Object.keys(MIMETYPES.VIDEO.MIMETYPE_EXT)
 
   const urlMediaType = url.mediaType || url.mimeType
   return mimeTypes.indexOf(urlMediaType) !== -1 && urlMediaType.startsWith('video/')
@@ -486,7 +496,7 @@ function videoFileActivityUrlToDBAttributes (video: VideoModel, videoObject: Vid
 
     const mediaType = fileUrl.mediaType || fileUrl.mimeType
     const attribute = {
-      extname: VIDEO_MIMETYPE_EXT[ mediaType ],
+      extname: MIMETYPES.VIDEO.MIMETYPE_EXT[ mediaType ],
       infoHash: parsed.infoHash,
       resolution: fileUrl.height,
       size: fileUrl.size,
diff --git a/server/lib/cache/actor-follow-score-cache.ts b/server/lib/cache/actor-follow-score-cache.ts
new file mode 100644
index 000000000..d070bde09
--- /dev/null
+++ b/server/lib/cache/actor-follow-score-cache.ts
@@ -0,0 +1,46 @@
+import { ACTOR_FOLLOW_SCORE } from '../../initializers'
+import { logger } from '../../helpers/logger'
+
+// Cache follows scores, instead of writing them too often in database
+// Keep data in memory, we don't really need Redis here as we don't really care to loose some scores
+class ActorFollowScoreCache {
+
+  private static instance: ActorFollowScoreCache
+  private pendingFollowsScore: { [ url: string ]: number } = {}
+
+  private constructor () {}
+
+  static get Instance () {
+    return this.instance || (this.instance = new this())
+  }
+
+  updateActorFollowsScore (goodInboxes: string[], badInboxes: string[]) {
+    if (goodInboxes.length === 0 && badInboxes.length === 0) return
+
+    logger.info('Updating %d good actor follows and %d bad actor follows scores in cache.', goodInboxes.length, badInboxes.length)
+
+    for (const goodInbox of goodInboxes) {
+      if (this.pendingFollowsScore[goodInbox] === undefined) this.pendingFollowsScore[goodInbox] = 0
+
+      this.pendingFollowsScore[goodInbox] += ACTOR_FOLLOW_SCORE.BONUS
+    }
+
+    for (const badInbox of badInboxes) {
+      if (this.pendingFollowsScore[badInbox] === undefined) this.pendingFollowsScore[badInbox] = 0
+
+      this.pendingFollowsScore[badInbox] += ACTOR_FOLLOW_SCORE.PENALTY
+    }
+  }
+
+  getPendingFollowsScoreCopy () {
+    return this.pendingFollowsScore
+  }
+
+  clearPendingFollowsScore () {
+    this.pendingFollowsScore = {}
+  }
+}
+
+export {
+  ActorFollowScoreCache
+}
diff --git a/server/lib/cache/index.ts b/server/lib/cache/index.ts
index 54eb983fa..e921d04a7 100644
--- a/server/lib/cache/index.ts
+++ b/server/lib/cache/index.ts
@@ -1,2 +1,3 @@
+export * from './actor-follow-score-cache'
 export * from './videos-preview-cache'
 export * from './videos-caption-cache'
diff --git a/server/lib/client-html.ts b/server/lib/client-html.ts
index fc013e0c3..b2c376e20 100644
--- a/server/lib/client-html.ts
+++ b/server/lib/client-html.ts
@@ -1,7 +1,7 @@
 import * as express from 'express'
 import * as Bluebird from 'bluebird'
 import { buildFileLocale, getDefaultLocale, is18nLocale, POSSIBLE_LOCALES } from '../../shared/models/i18n/i18n'
-import { CONFIG, CUSTOM_HTML_TAG_COMMENTS, EMBED_SIZE, STATIC_PATHS } from '../initializers'
+import { CONFIG, CUSTOM_HTML_TAG_COMMENTS, EMBED_SIZE } from '../initializers'
 import { join } from 'path'
 import { escapeHTML } from '../helpers/core-utils'
 import { VideoModel } from '../models/video/video'
@@ -18,21 +18,13 @@ export class ClientHtml {
     ClientHtml.htmlCache = {}
   }
 
-  static async getIndexHTML (req: express.Request, res: express.Response, paramLang?: string) {
-    const path = ClientHtml.getIndexPath(req, res, paramLang)
-    if (ClientHtml.htmlCache[path]) return ClientHtml.htmlCache[path]
-
-    const buffer = await readFile(path)
+  static async getDefaultHTMLPage (req: express.Request, res: express.Response, paramLang?: string) {
+    const html = await ClientHtml.getIndexHTML(req, res, paramLang)
 
-    let html = buffer.toString()
-
-    html = ClientHtml.addTitleTag(html)
-    html = ClientHtml.addDescriptionTag(html)
-    html = ClientHtml.addCustomCSS(html)
+    let customHtml = ClientHtml.addTitleTag(html)
+    customHtml = ClientHtml.addDescriptionTag(customHtml)
 
-    ClientHtml.htmlCache[path] = html
-
-    return html
+    return customHtml
   }
 
   static async getWatchHTMLPage (videoId: string, req: express.Request, res: express.Response) {
@@ -55,7 +47,26 @@ export class ClientHtml {
       return ClientHtml.getIndexHTML(req, res)
     }
 
-    return ClientHtml.addOpenGraphAndOEmbedTags(html, video)
+    let customHtml = ClientHtml.addTitleTag(html, escapeHTML(video.name))
+    customHtml = ClientHtml.addDescriptionTag(customHtml, escapeHTML(video.description))
+    customHtml = ClientHtml.addOpenGraphAndOEmbedTags(customHtml, video)
+
+    return customHtml
+  }
+
+  private static async getIndexHTML (req: express.Request, res: express.Response, paramLang?: string) {
+    const path = ClientHtml.getIndexPath(req, res, paramLang)
+    if (ClientHtml.htmlCache[path]) return ClientHtml.htmlCache[path]
+
+    const buffer = await readFile(path)
+
+    let html = buffer.toString()
+
+    html = ClientHtml.addCustomCSS(html)
+
+    ClientHtml.htmlCache[path] = html
+
+    return html
   }
 
   private static getIndexPath (req: express.Request, res: express.Response, paramLang?: string) {
@@ -81,14 +92,18 @@ export class ClientHtml {
     return join(__dirname, '../../../client/dist/' + buildFileLocale(lang) + '/index.html')
   }
 
-  private static addTitleTag (htmlStringPage: string) {
-    const titleTag = '<title>' + CONFIG.INSTANCE.NAME + '</title>'
+  private static addTitleTag (htmlStringPage: string, title?: string) {
+    let text = title || CONFIG.INSTANCE.NAME
+    if (title) text += ` - ${CONFIG.INSTANCE.NAME}`
+
+    const titleTag = `<title>${text}</title>`
 
     return htmlStringPage.replace(CUSTOM_HTML_TAG_COMMENTS.TITLE, titleTag)
   }
 
-  private static addDescriptionTag (htmlStringPage: string) {
-    const descriptionTag = `<meta name="description" content="${CONFIG.INSTANCE.SHORT_DESCRIPTION}" />`
+  private static addDescriptionTag (htmlStringPage: string, description?: string) {
+    const content = description || CONFIG.INSTANCE.SHORT_DESCRIPTION
+    const descriptionTag = `<meta name="description" content="${content}" />`
 
     return htmlStringPage.replace(CUSTOM_HTML_TAG_COMMENTS.DESCRIPTION, descriptionTag)
   }
@@ -100,8 +115,8 @@ export class ClientHtml {
   }
 
   private static addOpenGraphAndOEmbedTags (htmlStringPage: string, video: VideoModel) {
-    const previewUrl = CONFIG.WEBSERVER.URL + STATIC_PATHS.PREVIEWS + video.getPreviewName()
-    const videoUrl = CONFIG.WEBSERVER.URL + '/videos/watch/' + video.uuid
+    const previewUrl = CONFIG.WEBSERVER.URL + video.getPreviewStaticPath()
+    const videoUrl = CONFIG.WEBSERVER.URL + video.getWatchStaticPath()
 
     const videoNameEscaped = escapeHTML(video.name)
     const videoDescriptionEscaped = escapeHTML(video.description)
@@ -172,8 +187,8 @@ export class ClientHtml {
     // Schema.org
     tagsString += `<script type="application/ld+json">${JSON.stringify(schemaTags)}</script>`
 
-    // SEO
-    tagsString += `<link rel="canonical" href="${videoUrl}" />`
+    // SEO, use origin video url so Google does not index remote videos
+    tagsString += `<link rel="canonical" href="${video.url}" />`
 
     return htmlStringPage.replace(CUSTOM_HTML_TAG_COMMENTS.OPENGRAPH_AND_OEMBED, tagsString)
   }
diff --git a/server/lib/emailer.ts b/server/lib/emailer.ts
index 9327792fb..f384a254e 100644
--- a/server/lib/emailer.ts
+++ b/server/lib/emailer.ts
@@ -1,5 +1,4 @@
 import { createTransport, Transporter } from 'nodemailer'
-import { UserRight } from '../../shared/models/users'
 import { isTestInstance } from '../helpers/core-utils'
 import { bunyanLogger, logger } from '../helpers/logger'
 import { CONFIG } from '../initializers'
@@ -8,6 +7,11 @@ import { VideoModel } from '../models/video/video'
 import { JobQueue } from './job-queue'
 import { EmailPayload } from './job-queue/handlers/email'
 import { readFileSync } from 'fs-extra'
+import { VideoCommentModel } from '../models/video/video-comment'
+import { VideoAbuseModel } from '../models/video/video-abuse'
+import { VideoBlacklistModel } from '../models/video/video-blacklist'
+import { VideoImportModel } from '../models/video/video-import'
+import { ActorFollowModel } from '../models/activitypub/actor-follow'
 
 class Emailer {
 
@@ -22,7 +26,7 @@ class Emailer {
     if (this.initialized === true) return
     this.initialized = true
 
-    if (CONFIG.SMTP.HOSTNAME && CONFIG.SMTP.PORT) {
+    if (Emailer.isEnabled()) {
       logger.info('Using %s:%s as SMTP server.', CONFIG.SMTP.HOSTNAME, CONFIG.SMTP.PORT)
 
       let tls
@@ -57,6 +61,10 @@ class Emailer {
     }
   }
 
+  static isEnabled () {
+    return !!CONFIG.SMTP.HOSTNAME && !!CONFIG.SMTP.PORT
+  }
+
   async checkConnectionOrDie () {
     if (!this.transporter) return
 
@@ -72,50 +80,158 @@ class Emailer {
     }
   }
 
-  addForgetPasswordEmailJob (to: string, resetPasswordUrl: string) {
+  addNewVideoFromSubscriberNotification (to: string[], video: VideoModel) {
+    const channelName = video.VideoChannel.getDisplayName()
+    const videoUrl = CONFIG.WEBSERVER.URL + video.getWatchStaticPath()
+
     const text = `Hi dear user,\n\n` +
-      `It seems you forgot your password on ${CONFIG.WEBSERVER.HOST}! ` +
-      `Please follow this link to reset it: ${resetPasswordUrl}\n\n` +
-      `If you are not the person who initiated this request, please ignore this email.\n\n` +
+      `Your subscription ${channelName} just published a new video: ${video.name}` +
+      `\n\n` +
+      `You can view it on ${videoUrl} ` +
+      `\n\n` +
       `Cheers,\n` +
       `PeerTube.`
 
     const emailPayload: EmailPayload = {
-      to: [ to ],
-      subject: 'Reset your PeerTube password',
+      to,
+      subject: channelName + ' just published a new video',
       text
     }
 
     return JobQueue.Instance.createJob({ type: 'email', payload: emailPayload })
   }
 
-  addVerifyEmailJob (to: string, verifyEmailUrl: string) {
-    const text = `Welcome to PeerTube,\n\n` +
-      `To start using PeerTube on ${CONFIG.WEBSERVER.HOST} you must  verify your email! ` +
-      `Please follow this link to verify this email belongs to you: ${verifyEmailUrl}\n\n` +
-      `If you are not the person who initiated this request, please ignore this email.\n\n` +
+  addNewFollowNotification (to: string[], actorFollow: ActorFollowModel, followType: 'account' | 'channel') {
+    const followerName = actorFollow.ActorFollower.Account.getDisplayName()
+    const followingName = (actorFollow.ActorFollowing.VideoChannel || actorFollow.ActorFollowing.Account).getDisplayName()
+
+    const text = `Hi dear user,\n\n` +
+      `Your ${followType} ${followingName} has a new subscriber: ${followerName}` +
+      `\n\n` +
       `Cheers,\n` +
       `PeerTube.`
 
     const emailPayload: EmailPayload = {
-      to: [ to ],
-      subject: 'Verify your PeerTube email',
+      to,
+      subject: 'New follower on your channel ' + followingName,
+      text
+    }
+
+    return JobQueue.Instance.createJob({ type: 'email', payload: emailPayload })
+  }
+
+  myVideoPublishedNotification (to: string[], video: VideoModel) {
+    const videoUrl = CONFIG.WEBSERVER.URL + video.getWatchStaticPath()
+
+    const text = `Hi dear user,\n\n` +
+      `Your video ${video.name} has been published.` +
+      `\n\n` +
+      `You can view it on ${videoUrl} ` +
+      `\n\n` +
+      `Cheers,\n` +
+      `PeerTube.`
+
+    const emailPayload: EmailPayload = {
+      to,
+      subject: `Your video ${video.name} is published`,
+      text
+    }
+
+    return JobQueue.Instance.createJob({ type: 'email', payload: emailPayload })
+  }
+
+  myVideoImportSuccessNotification (to: string[], videoImport: VideoImportModel) {
+    const videoUrl = CONFIG.WEBSERVER.URL + videoImport.Video.getWatchStaticPath()
+
+    const text = `Hi dear user,\n\n` +
+      `Your video import ${videoImport.getTargetIdentifier()} is finished.` +
+      `\n\n` +
+      `You can view the imported video on ${videoUrl} ` +
+      `\n\n` +
+      `Cheers,\n` +
+      `PeerTube.`
+
+    const emailPayload: EmailPayload = {
+      to,
+      subject: `Your video import ${videoImport.getTargetIdentifier()} is finished`,
       text
     }
 
     return JobQueue.Instance.createJob({ type: 'email', payload: emailPayload })
   }
 
-  async addVideoAbuseReportJob (videoId: number) {
-    const video = await VideoModel.load(videoId)
-    if (!video) throw new Error('Unknown Video id during Abuse report.')
+  myVideoImportErrorNotification (to: string[], videoImport: VideoImportModel) {
+    const importUrl = CONFIG.WEBSERVER.URL + '/my-account/video-imports'
+
+    const text = `Hi dear user,\n\n` +
+      `Your video import ${videoImport.getTargetIdentifier()} encountered an error.` +
+      `\n\n` +
+      `See your videos import dashboard for more information: ${importUrl}` +
+      `\n\n` +
+      `Cheers,\n` +
+      `PeerTube.`
+
+    const emailPayload: EmailPayload = {
+      to,
+      subject: `Your video import ${videoImport.getTargetIdentifier()} encountered an error`,
+      text
+    }
+
+    return JobQueue.Instance.createJob({ type: 'email', payload: emailPayload })
+  }
+
+  addNewCommentOnMyVideoNotification (to: string[], comment: VideoCommentModel) {
+    const accountName = comment.Account.getDisplayName()
+    const video = comment.Video
+    const commentUrl = CONFIG.WEBSERVER.URL + comment.getCommentStaticPath()
+
+    const text = `Hi dear user,\n\n` +
+      `A new comment has been posted by ${accountName} on your video ${video.name}` +
+      `\n\n` +
+      `You can view it on ${commentUrl} ` +
+      `\n\n` +
+      `Cheers,\n` +
+      `PeerTube.`
+
+    const emailPayload: EmailPayload = {
+      to,
+      subject: 'New comment on your video ' + video.name,
+      text
+    }
+
+    return JobQueue.Instance.createJob({ type: 'email', payload: emailPayload })
+  }
+
+  addNewCommentMentionNotification (to: string[], comment: VideoCommentModel) {
+    const accountName = comment.Account.getDisplayName()
+    const video = comment.Video
+    const commentUrl = CONFIG.WEBSERVER.URL + comment.getCommentStaticPath()
+
+    const text = `Hi dear user,\n\n` +
+      `${accountName} mentioned you on video ${video.name}` +
+      `\n\n` +
+      `You can view the comment on ${commentUrl} ` +
+      `\n\n` +
+      `Cheers,\n` +
+      `PeerTube.`
+
+    const emailPayload: EmailPayload = {
+      to,
+      subject: 'Mention on video ' + video.name,
+      text
+    }
+
+    return JobQueue.Instance.createJob({ type: 'email', payload: emailPayload })
+  }
+
+  addVideoAbuseModeratorsNotification (to: string[], videoAbuse: VideoAbuseModel) {
+    const videoUrl = CONFIG.WEBSERVER.URL + videoAbuse.Video.getWatchStaticPath()
 
     const text = `Hi,\n\n` +
-      `Your instance received an abuse for the following video ${video.url}\n\n` +
+      `${CONFIG.WEBSERVER.HOST} received an abuse for the following video ${videoUrl}\n\n` +
       `Cheers,\n` +
       `PeerTube.`
 
-    const to = await UserModel.listEmailsWithRight(UserRight.MANAGE_VIDEO_ABUSES)
     const emailPayload: EmailPayload = {
       to,
       subject: '[PeerTube] Received a video abuse',
@@ -125,16 +241,27 @@ class Emailer {
     return JobQueue.Instance.createJob({ type: 'email', payload: emailPayload })
   }
 
-  async addVideoBlacklistReportJob (videoId: number, reason?: string) {
-    const video = await VideoModel.loadAndPopulateAccountAndServerAndTags(videoId)
-    if (!video) throw new Error('Unknown Video id during Blacklist report.')
-    // It's not our user
-    if (video.remote === true) return
+  addNewUserRegistrationNotification (to: string[], user: UserModel) {
+    const text = `Hi,\n\n` +
+      `User ${user.username} just registered on ${CONFIG.WEBSERVER.HOST} PeerTube instance.\n\n` +
+      `Cheers,\n` +
+      `PeerTube.`
 
-    const user = await UserModel.loadById(video.VideoChannel.Account.userId)
+    const emailPayload: EmailPayload = {
+      to,
+      subject: '[PeerTube] New user registration on ' + CONFIG.WEBSERVER.HOST,
+      text
+    }
 
-    const reasonString = reason ? ` for the following reason: ${reason}` : ''
-    const blockedString = `Your video ${video.name} on ${CONFIG.WEBSERVER.HOST} has been blacklisted${reasonString}.`
+    return JobQueue.Instance.createJob({ type: 'email', payload: emailPayload })
+  }
+
+  addVideoBlacklistNotification (to: string[], videoBlacklist: VideoBlacklistModel) {
+    const videoName = videoBlacklist.Video.name
+    const videoUrl = CONFIG.WEBSERVER.URL + videoBlacklist.Video.getWatchStaticPath()
+
+    const reasonString = videoBlacklist.reason ? ` for the following reason: ${videoBlacklist.reason}` : ''
+    const blockedString = `Your video ${videoName} (${videoUrl} on ${CONFIG.WEBSERVER.HOST} has been blacklisted${reasonString}.`
 
     const text = 'Hi,\n\n' +
       blockedString +
@@ -142,33 +269,26 @@ class Emailer {
       'Cheers,\n' +
       `PeerTube.`
 
-    const to = user.email
     const emailPayload: EmailPayload = {
-      to: [ to ],
-      subject: `[PeerTube] Video ${video.name} blacklisted`,
+      to,
+      subject: `[PeerTube] Video ${videoName} blacklisted`,
       text
     }
 
     return JobQueue.Instance.createJob({ type: 'email', payload: emailPayload })
   }
 
-  async addVideoUnblacklistReportJob (videoId: number) {
-    const video = await VideoModel.loadAndPopulateAccountAndServerAndTags(videoId)
-    if (!video) throw new Error('Unknown Video id during Blacklist report.')
-    // It's not our user
-    if (video.remote === true) return
-
-    const user = await UserModel.loadById(video.VideoChannel.Account.userId)
+  addVideoUnblacklistNotification (to: string[], video: VideoModel) {
+    const videoUrl = CONFIG.WEBSERVER.URL + video.getWatchStaticPath()
 
     const text = 'Hi,\n\n' +
-      `Your video ${video.name} on ${CONFIG.WEBSERVER.HOST} has been unblacklisted.` +
+      `Your video ${video.name} (${videoUrl}) on ${CONFIG.WEBSERVER.HOST} has been unblacklisted.` +
       '\n\n' +
       'Cheers,\n' +
       `PeerTube.`
 
-    const to = user.email
     const emailPayload: EmailPayload = {
-      to: [ to ],
+      to,
       subject: `[PeerTube] Video ${video.name} unblacklisted`,
       text
     }
@@ -176,6 +296,40 @@ class Emailer {
     return JobQueue.Instance.createJob({ type: 'email', payload: emailPayload })
   }
 
+  addForgetPasswordEmailJob (to: string, resetPasswordUrl: string) {
+    const text = `Hi dear user,\n\n` +
+      `It seems you forgot your password on ${CONFIG.WEBSERVER.HOST}! ` +
+      `Please follow this link to reset it: ${resetPasswordUrl}\n\n` +
+      `If you are not the person who initiated this request, please ignore this email.\n\n` +
+      `Cheers,\n` +
+      `PeerTube.`
+
+    const emailPayload: EmailPayload = {
+      to: [ to ],
+      subject: 'Reset your PeerTube password',
+      text
+    }
+
+    return JobQueue.Instance.createJob({ type: 'email', payload: emailPayload })
+  }
+
+  addVerifyEmailJob (to: string, verifyEmailUrl: string) {
+    const text = `Welcome to PeerTube,\n\n` +
+      `To start using PeerTube on ${CONFIG.WEBSERVER.HOST} you must  verify your email! ` +
+      `Please follow this link to verify this email belongs to you: ${verifyEmailUrl}\n\n` +
+      `If you are not the person who initiated this request, please ignore this email.\n\n` +
+      `Cheers,\n` +
+      `PeerTube.`
+
+    const emailPayload: EmailPayload = {
+      to: [ to ],
+      subject: 'Verify your PeerTube email',
+      text
+    }
+
+    return JobQueue.Instance.createJob({ type: 'email', payload: emailPayload })
+  }
+
   addUserBlockJob (user: UserModel, blocked: boolean, reason?: string) {
     const reasonString = reason ? ` for the following reason: ${reason}` : ''
     const blockedWord = blocked ? 'blocked' : 'unblocked'
@@ -197,13 +351,32 @@ class Emailer {
     return JobQueue.Instance.createJob({ type: 'email', payload: emailPayload })
   }
 
-  sendMail (to: string[], subject: string, text: string) {
-    if (!this.transporter) {
+  addContactFormJob (fromEmail: string, fromName: string, body: string) {
+    const text = 'Hello dear admin,\n\n' +
+      fromName + ' sent you a message' +
+      '\n\n---------------------------------------\n\n' +
+      body +
+      '\n\n---------------------------------------\n\n' +
+      'Cheers,\n' +
+      'PeerTube.'
+
+    const emailPayload: EmailPayload = {
+      from: fromEmail,
+      to: [ CONFIG.ADMIN.EMAIL ],
+      subject: '[PeerTube] Contact form submitted',
+      text
+    }
+
+    return JobQueue.Instance.createJob({ type: 'email', payload: emailPayload })
+  }
+
+  sendMail (to: string[], subject: string, text: string, from?: string) {
+    if (!Emailer.isEnabled()) {
       throw new Error('Cannot send mail because SMTP is not configured.')
     }
 
     return this.transporter.sendMail({
-      from: CONFIG.SMTP.FROM_ADDRESS,
+      from: from || CONFIG.SMTP.FROM_ADDRESS,
       to: to.join(','),
       subject,
       text
diff --git a/server/lib/job-queue/handlers/activitypub-follow.ts b/server/lib/job-queue/handlers/activitypub-follow.ts
index 36d0f237b..b4d381062 100644
--- a/server/lib/job-queue/handlers/activitypub-follow.ts
+++ b/server/lib/job-queue/handlers/activitypub-follow.ts
@@ -8,6 +8,7 @@ import { getOrCreateActorAndServerAndModel } from '../../activitypub/actor'
 import { retryTransactionWrapper } from '../../../helpers/database-utils'
 import { ActorFollowModel } from '../../../models/activitypub/actor-follow'
 import { ActorModel } from '../../../models/activitypub/actor'
+import { Notifier } from '../../notifier'
 
 export type ActivitypubFollowPayload = {
   followerActorId: number
@@ -42,7 +43,7 @@ export {
 
 // ---------------------------------------------------------------------------
 
-function follow (fromActor: ActorModel, targetActor: ActorModel) {
+async function follow (fromActor: ActorModel, targetActor: ActorModel) {
   if (fromActor.id === targetActor.id) {
     throw new Error('Follower is the same than target actor.')
   }
@@ -50,7 +51,7 @@ function follow (fromActor: ActorModel, targetActor: ActorModel) {
   // Same server, direct accept
   const state = !fromActor.serverId && !targetActor.serverId ? 'accepted' : 'pending'
 
-  return sequelizeTypescript.transaction(async t => {
+  const actorFollow = await sequelizeTypescript.transaction(async t => {
     const [ actorFollow ] = await ActorFollowModel.findOrCreate({
       where: {
         actorId: fromActor.id,
@@ -68,5 +69,9 @@ function follow (fromActor: ActorModel, targetActor: ActorModel) {
 
     // Send a notification to remote server if our follow is not already accepted
     if (actorFollow.state !== 'accepted') await sendFollow(actorFollow)
+
+    return actorFollow
   })
+
+  if (actorFollow.state === 'accepted') Notifier.Instance.notifyOfNewFollow(actorFollow)
 }
diff --git a/server/lib/job-queue/handlers/activitypub-http-broadcast.ts b/server/lib/job-queue/handlers/activitypub-http-broadcast.ts
index abbd89b3b..9493945ff 100644
--- a/server/lib/job-queue/handlers/activitypub-http-broadcast.ts
+++ b/server/lib/job-queue/handlers/activitypub-http-broadcast.ts
@@ -5,6 +5,7 @@ import { doRequest } from '../../../helpers/requests'
 import { ActorFollowModel } from '../../../models/activitypub/actor-follow'
 import { buildGlobalHeaders, buildSignedRequestOptions, computeBody } from './utils/activitypub-http-utils'
 import { BROADCAST_CONCURRENCY, JOB_REQUEST_TIMEOUT } from '../../../initializers'
+import { ActorFollowScoreCache } from '../../cache'
 
 export type ActivitypubHttpBroadcastPayload = {
   uris: string[]
@@ -38,7 +39,7 @@ async function processActivityPubHttpBroadcast (job: Bull.Job) {
       .catch(() => badUrls.push(uri))
   }, { concurrency: BROADCAST_CONCURRENCY })
 
-  return ActorFollowModel.updateActorFollowsScore(goodUrls, badUrls, undefined)
+  return ActorFollowScoreCache.Instance.updateActorFollowsScore(goodUrls, badUrls)
 }
 
 // ---------------------------------------------------------------------------
diff --git a/server/lib/job-queue/handlers/activitypub-http-unicast.ts b/server/lib/job-queue/handlers/activitypub-http-unicast.ts
index d36479032..3973dcdc8 100644
--- a/server/lib/job-queue/handlers/activitypub-http-unicast.ts
+++ b/server/lib/job-queue/handlers/activitypub-http-unicast.ts
@@ -1,9 +1,9 @@
 import * as Bull from 'bull'
 import { logger } from '../../../helpers/logger'
 import { doRequest } from '../../../helpers/requests'
-import { ActorFollowModel } from '../../../models/activitypub/actor-follow'
 import { buildGlobalHeaders, buildSignedRequestOptions, computeBody } from './utils/activitypub-http-utils'
 import { JOB_REQUEST_TIMEOUT } from '../../../initializers'
+import { ActorFollowScoreCache } from '../../cache'
 
 export type ActivitypubHttpUnicastPayload = {
   uri: string
@@ -31,9 +31,9 @@ async function processActivityPubHttpUnicast (job: Bull.Job) {
 
   try {
     await doRequest(options)
-    ActorFollowModel.updateActorFollowsScore([ uri ], [], undefined)
+    ActorFollowScoreCache.Instance.updateActorFollowsScore([ uri ], [])
   } catch (err) {
-    ActorFollowModel.updateActorFollowsScore([], [ uri ], undefined)
+    ActorFollowScoreCache.Instance.updateActorFollowsScore([], [ uri ])
 
     throw err
   }
diff --git a/server/lib/job-queue/handlers/activitypub-refresher.ts b/server/lib/job-queue/handlers/activitypub-refresher.ts
index 7752b3b40..454b975fe 100644
--- a/server/lib/job-queue/handlers/activitypub-refresher.ts
+++ b/server/lib/job-queue/handlers/activitypub-refresher.ts
@@ -1,29 +1,33 @@
 import * as Bull from 'bull'
 import { logger } from '../../../helpers/logger'
 import { fetchVideoByUrl } from '../../../helpers/video'
-import { refreshVideoIfNeeded } from '../../activitypub'
+import { refreshVideoIfNeeded, refreshActorIfNeeded } from '../../activitypub'
+import { ActorModel } from '../../../models/activitypub/actor'
 
 export type RefreshPayload = {
-  videoUrl: string
-  type: 'video'
+  type: 'video' | 'actor'
+  url: string
 }
 
 async function refreshAPObject (job: Bull.Job) {
   const payload = job.data as RefreshPayload
-  logger.info('Processing AP refresher in job %d.', job.id)
 
-  if (payload.type === 'video') return refreshAPVideo(payload.videoUrl)
+  logger.info('Processing AP refresher in job %d for %s.', job.id, payload.url)
+
+  if (payload.type === 'video') return refreshVideo(payload.url)
+  if (payload.type === 'actor') return refreshActor(payload.url)
 }
 
 // ---------------------------------------------------------------------------
 
 export {
+  refreshActor,
   refreshAPObject
 }
 
 // ---------------------------------------------------------------------------
 
-async function refreshAPVideo (videoUrl: string) {
+async function refreshVideo (videoUrl: string) {
   const fetchType = 'all' as 'all'
   const syncParam = { likes: true, dislikes: true, shares: true, comments: true, thumbnail: true }
 
@@ -38,3 +42,13 @@ async function refreshAPVideo (videoUrl: string) {
     await refreshVideoIfNeeded(refreshOptions)
   }
 }
+
+async function refreshActor (actorUrl: string) {
+  const fetchType = 'all' as 'all'
+  const actor = await ActorModel.loadByUrlAndPopulateAccountAndChannel(actorUrl)
+
+  if (actor) {
+    await refreshActorIfNeeded(actor, fetchType)
+  }
+
+}
diff --git a/server/lib/job-queue/handlers/email.ts b/server/lib/job-queue/handlers/email.ts
index 73d98ae54..220d0af32 100644
--- a/server/lib/job-queue/handlers/email.ts
+++ b/server/lib/job-queue/handlers/email.ts
@@ -6,13 +6,14 @@ export type EmailPayload = {
   to: string[]
   subject: string
   text: string
+  from?: string
 }
 
 async function processEmail (job: Bull.Job) {
   const payload = job.data as EmailPayload
   logger.info('Processing email in job %d.', job.id)
 
-  return Emailer.Instance.sendMail(payload.to, payload.subject, payload.text)
+  return Emailer.Instance.sendMail(payload.to, payload.subject, payload.text, payload.from)
 }
 
 // ---------------------------------------------------------------------------
diff --git a/server/lib/job-queue/handlers/video-file.ts b/server/lib/job-queue/handlers/video-file.ts
index adc0a2a15..593e43cc5 100644
--- a/server/lib/job-queue/handlers/video-file.ts
+++ b/server/lib/job-queue/handlers/video-file.ts
@@ -8,7 +8,8 @@ import { retryTransactionWrapper } from '../../../helpers/database-utils'
 import { sequelizeTypescript } from '../../../initializers'
 import * as Bluebird from 'bluebird'
 import { computeResolutionsToTranscode } from '../../../helpers/ffmpeg-utils'
-import { importVideoFile, transcodeOriginalVideofile, optimizeVideofile } from '../../video-transcoding'
+import { importVideoFile, optimizeVideofile, transcodeOriginalVideofile } from '../../video-transcoding'
+import { Notifier } from '../../notifier'
 
 export type VideoFilePayload = {
   videoUUID: string
@@ -67,17 +68,17 @@ async function processVideoFile (job: Bull.Job) {
 async function onVideoFileTranscoderOrImportSuccess (video: VideoModel) {
   if (video === undefined) return undefined
 
-  return sequelizeTypescript.transaction(async t => {
+  const { videoDatabase, videoPublished } = await sequelizeTypescript.transaction(async t => {
     // Maybe the video changed in database, refresh it
     let videoDatabase = await VideoModel.loadAndPopulateAccountAndServerAndTags(video.uuid, t)
     // Video does not exist anymore
     if (!videoDatabase) return undefined
 
-    let isNewVideo = false
+    let videoPublished = false
 
     // We transcoded the video file in another format, now we can publish it
     if (videoDatabase.state !== VideoState.PUBLISHED) {
-      isNewVideo = true
+      videoPublished = true
 
       videoDatabase.state = VideoState.PUBLISHED
       videoDatabase.publishedAt = new Date()
@@ -85,21 +86,26 @@ async function onVideoFileTranscoderOrImportSuccess (video: VideoModel) {
     }
 
     // If the video was not published, we consider it is a new one for other instances
-    await federateVideoIfNeeded(videoDatabase, isNewVideo, t)
+    await federateVideoIfNeeded(videoDatabase, videoPublished, t)
 
-    return undefined
+    return { videoDatabase, videoPublished }
   })
+
+  if (videoPublished) {
+    Notifier.Instance.notifyOnNewVideo(videoDatabase)
+    Notifier.Instance.notifyOnPendingVideoPublished(videoDatabase)
+  }
 }
 
-async function onVideoFileOptimizerSuccess (video: VideoModel, isNewVideo: boolean) {
-  if (video === undefined) return undefined
+async function onVideoFileOptimizerSuccess (videoArg: VideoModel, isNewVideo: boolean) {
+  if (videoArg === undefined) return undefined
 
   // Outside the transaction (IO on disk)
-  const { videoFileResolution } = await video.getOriginalFileResolution()
+  const { videoFileResolution } = await videoArg.getOriginalFileResolution()
 
-  return sequelizeTypescript.transaction(async t => {
+  const { videoDatabase, videoPublished } = await sequelizeTypescript.transaction(async t => {
     // Maybe the video changed in database, refresh it
-    const videoDatabase = await VideoModel.loadAndPopulateAccountAndServerAndTags(video.uuid, t)
+    let videoDatabase = await VideoModel.loadAndPopulateAccountAndServerAndTags(videoArg.uuid, t)
     // Video does not exist anymore
     if (!videoDatabase) return undefined
 
@@ -110,8 +116,10 @@ async function onVideoFileOptimizerSuccess (video: VideoModel, isNewVideo: boole
       { resolutions: resolutionsEnabled }
     )
 
+    let videoPublished = false
+
     if (resolutionsEnabled.length !== 0) {
-      const tasks: Bluebird<any>[] = []
+      const tasks: Bluebird<Bull.Job<any>>[] = []
 
       for (const resolution of resolutionsEnabled) {
         const dataInput = {
@@ -127,15 +135,22 @@ async function onVideoFileOptimizerSuccess (video: VideoModel, isNewVideo: boole
 
       logger.info('Transcoding jobs created for uuid %s.', videoDatabase.uuid, { resolutionsEnabled })
     } else {
+      videoPublished = true
+
       // No transcoding to do, it's now published
-      video.state = VideoState.PUBLISHED
-      video = await video.save({ transaction: t })
+      videoDatabase.state = VideoState.PUBLISHED
+      videoDatabase = await videoDatabase.save({ transaction: t })
 
-      logger.info('No transcoding jobs created for video %s (no resolutions).', video.uuid)
+      logger.info('No transcoding jobs created for video %s (no resolutions).', videoDatabase.uuid, { privacy: videoDatabase.privacy })
     }
 
-    return federateVideoIfNeeded(video, isNewVideo, t)
+    await federateVideoIfNeeded(videoDatabase, isNewVideo, t)
+
+    return { videoDatabase, videoPublished }
   })
+
+  if (isNewVideo) Notifier.Instance.notifyOnNewVideo(videoDatabase)
+  if (videoPublished) Notifier.Instance.notifyOnPendingVideoPublished(videoDatabase)
 }
 
 // ---------------------------------------------------------------------------
diff --git a/server/lib/job-queue/handlers/video-import.ts b/server/lib/job-queue/handlers/video-import.ts
index 4de901c0c..12004dcd7 100644
--- a/server/lib/job-queue/handlers/video-import.ts
+++ b/server/lib/job-queue/handlers/video-import.ts
@@ -7,14 +7,15 @@ import { getDurationFromVideoFile, getVideoFileFPS, getVideoFileResolution } fro
 import { extname, join } from 'path'
 import { VideoFileModel } from '../../../models/video/video-file'
 import { CONFIG, PREVIEWS_SIZE, sequelizeTypescript, THUMBNAILS_SIZE, VIDEO_IMPORT_TIMEOUT } from '../../../initializers'
-import { doRequestAndSaveToFile, downloadImage } from '../../../helpers/requests'
+import { downloadImage } from '../../../helpers/requests'
 import { VideoState } from '../../../../shared'
 import { JobQueue } from '../index'
 import { federateVideoIfNeeded } from '../../activitypub'
 import { VideoModel } from '../../../models/video/video'
 import { downloadWebTorrentVideo } from '../../../helpers/webtorrent'
 import { getSecureTorrentName } from '../../../helpers/utils'
-import { remove, rename, stat } from 'fs-extra'
+import { remove, move, stat } from 'fs-extra'
+import { Notifier } from '../../notifier'
 
 type VideoImportYoutubeDLPayload = {
   type: 'youtube-dl'
@@ -109,6 +110,7 @@ async function processFile (downloader: () => Promise<string>, videoImport: Vide
   let tempVideoPath: string
   let videoDestFile: string
   let videoFile: VideoFileModel
+
   try {
     // Download video from youtubeDL
     tempVideoPath = await downloader()
@@ -138,14 +140,13 @@ async function processFile (downloader: () => Promise<string>, videoImport: Vide
 
     // Move file
     videoDestFile = join(CONFIG.STORAGE.VIDEOS_DIR, videoImport.Video.getVideoFilename(videoFile))
-    await rename(tempVideoPath, videoDestFile)
+    await move(tempVideoPath, videoDestFile)
     tempVideoPath = null // This path is not used anymore
 
     // Process thumbnail
     if (options.downloadThumbnail) {
       if (options.thumbnailUrl) {
-        const destThumbnailPath = join(CONFIG.STORAGE.THUMBNAILS_DIR, videoImport.Video.getThumbnailName())
-        await downloadImage(options.thumbnailUrl, destThumbnailPath, THUMBNAILS_SIZE)
+        await downloadImage(options.thumbnailUrl, CONFIG.STORAGE.THUMBNAILS_DIR, videoImport.Video.getThumbnailName(), THUMBNAILS_SIZE)
       } else {
         await videoImport.Video.createThumbnail(videoFile)
       }
@@ -156,8 +157,7 @@ async function processFile (downloader: () => Promise<string>, videoImport: Vide
     // Process preview
     if (options.downloadPreview) {
       if (options.thumbnailUrl) {
-        const destPreviewPath = join(CONFIG.STORAGE.PREVIEWS_DIR, videoImport.Video.getPreviewName())
-        await downloadImage(options.thumbnailUrl, destPreviewPath, PREVIEWS_SIZE)
+        await downloadImage(options.thumbnailUrl, CONFIG.STORAGE.PREVIEWS_DIR, videoImport.Video.getPreviewName(), PREVIEWS_SIZE)
       } else {
         await videoImport.Video.createPreview(videoFile)
       }
@@ -180,7 +180,7 @@ async function processFile (downloader: () => Promise<string>, videoImport: Vide
       // Update video DB object
       video.duration = duration
       video.state = CONFIG.TRANSCODING.ENABLED ? VideoState.TO_TRANSCODE : VideoState.PUBLISHED
-      const videoUpdated = await video.save({ transaction: t })
+      await video.save({ transaction: t })
 
       // Now we can federate the video (reload from database, we need more attributes)
       const videoForFederation = await VideoModel.loadAndPopulateAccountAndServerAndTags(video.uuid, t)
@@ -192,10 +192,13 @@ async function processFile (downloader: () => Promise<string>, videoImport: Vide
 
       logger.info('Video %s imported.', video.uuid)
 
-      videoImportUpdated.Video = videoUpdated
+      videoImportUpdated.Video = videoForFederation
       return videoImportUpdated
     })
 
+    Notifier.Instance.notifyOnNewVideo(videoImportUpdated.Video)
+    Notifier.Instance.notifyOnFinishedVideoImport(videoImportUpdated, true)
+
     // Create transcoding jobs?
     if (videoImportUpdated.Video.state === VideoState.TO_TRANSCODE) {
       // Put uuid because we don't have id auto incremented for now
@@ -218,6 +221,8 @@ async function processFile (downloader: () => Promise<string>, videoImport: Vide
     videoImport.state = VideoImportState.FAILED
     await videoImport.save()
 
+    Notifier.Instance.notifyOnFinishedVideoImport(videoImport, false)
+
     throw err
   }
 }
diff --git a/server/lib/job-queue/handlers/video-views.ts b/server/lib/job-queue/handlers/video-views.ts
index 038ef43e2..fa1fd13b3 100644
--- a/server/lib/job-queue/handlers/video-views.ts
+++ b/server/lib/job-queue/handlers/video-views.ts
@@ -23,9 +23,7 @@ async function processVideosViews () {
   for (const videoId of videoIds) {
     try {
       const views = await Redis.Instance.getVideoViews(videoId, hour)
-      if (isNaN(views)) {
-        logger.error('Cannot process videos views of video %d in hour %d: views number is NaN (%s).', videoId, hour, views)
-      } else {
+      if (views) {
         logger.debug('Adding %d views to video %d in hour %d.', views, videoId, hour)
 
         try {
diff --git a/server/lib/job-queue/job-queue.ts b/server/lib/job-queue/job-queue.ts
index 5862e178f..ba9cbe0d9 100644
--- a/server/lib/job-queue/job-queue.ts
+++ b/server/lib/job-queue/job-queue.ts
@@ -88,7 +88,6 @@ class JobQueue {
 
       queue.on('error', err => {
         logger.error('Error in job queue %s.', handlerName, { err })
-        process.exit(-1)
       })
 
       this.queues[handlerName] = queue
@@ -166,10 +165,10 @@ class JobQueue {
     return total
   }
 
-  removeOldJobs () {
+  async removeOldJobs () {
     for (const key of Object.keys(this.queues)) {
       const queue = this.queues[key]
-      queue.clean(JOB_COMPLETED_LIFETIME, 'completed')
+      await queue.clean(JOB_COMPLETED_LIFETIME, 'completed')
     }
   }
 
diff --git a/server/lib/notifier.ts b/server/lib/notifier.ts
new file mode 100644
index 000000000..d1b331346
--- /dev/null
+++ b/server/lib/notifier.ts
@@ -0,0 +1,455 @@
+import { UserNotificationSettingValue, UserNotificationType, UserRight } from '../../shared/models/users'
+import { logger } from '../helpers/logger'
+import { VideoModel } from '../models/video/video'
+import { Emailer } from './emailer'
+import { UserNotificationModel } from '../models/account/user-notification'
+import { VideoCommentModel } from '../models/video/video-comment'
+import { UserModel } from '../models/account/user'
+import { PeerTubeSocket } from './peertube-socket'
+import { CONFIG } from '../initializers/constants'
+import { VideoPrivacy, VideoState } from '../../shared/models/videos'
+import { VideoAbuseModel } from '../models/video/video-abuse'
+import { VideoBlacklistModel } from '../models/video/video-blacklist'
+import * as Bluebird from 'bluebird'
+import { VideoImportModel } from '../models/video/video-import'
+import { AccountBlocklistModel } from '../models/account/account-blocklist'
+import { ActorFollowModel } from '../models/activitypub/actor-follow'
+import { AccountModel } from '../models/account/account'
+
+class Notifier {
+
+  private static instance: Notifier
+
+  private constructor () {}
+
+  notifyOnNewVideo (video: VideoModel): void {
+    // Only notify on public and published videos
+    if (video.privacy !== VideoPrivacy.PUBLIC || video.state !== VideoState.PUBLISHED) return
+
+    this.notifySubscribersOfNewVideo(video)
+      .catch(err => logger.error('Cannot notify subscribers of new video %s.', video.url, { err }))
+  }
+
+  notifyOnPendingVideoPublished (video: VideoModel): void {
+    // Only notify on public videos that has been published while the user waited transcoding/scheduled update
+    if (video.waitTranscoding === false && !video.ScheduleVideoUpdate) return
+
+    this.notifyOwnedVideoHasBeenPublished(video)
+        .catch(err => logger.error('Cannot notify owner that its video %s has been published.', video.url, { err }))
+  }
+
+  notifyOnNewComment (comment: VideoCommentModel): void {
+    this.notifyVideoOwnerOfNewComment(comment)
+        .catch(err => logger.error('Cannot notify video owner of new comment %s.', comment.url, { err }))
+
+    this.notifyOfCommentMention(comment)
+        .catch(err => logger.error('Cannot notify mentions of comment %s.', comment.url, { err }))
+  }
+
+  notifyOnNewVideoAbuse (videoAbuse: VideoAbuseModel): void {
+    this.notifyModeratorsOfNewVideoAbuse(videoAbuse)
+      .catch(err => logger.error('Cannot notify of new video abuse of video %s.', videoAbuse.Video.url, { err }))
+  }
+
+  notifyOnVideoBlacklist (videoBlacklist: VideoBlacklistModel): void {
+    this.notifyVideoOwnerOfBlacklist(videoBlacklist)
+      .catch(err => logger.error('Cannot notify video owner of new video blacklist of %s.', videoBlacklist.Video.url, { err }))
+  }
+
+  notifyOnVideoUnblacklist (video: VideoModel): void {
+    this.notifyVideoOwnerOfUnblacklist(video)
+        .catch(err => logger.error('Cannot notify video owner of new video blacklist of %s.', video.url, { err }))
+  }
+
+  notifyOnFinishedVideoImport (videoImport: VideoImportModel, success: boolean): void {
+    this.notifyOwnerVideoImportIsFinished(videoImport, success)
+      .catch(err => logger.error('Cannot notify owner that its video import %s is finished.', videoImport.getTargetIdentifier(), { err }))
+  }
+
+  notifyOnNewUserRegistration (user: UserModel): void {
+    this.notifyModeratorsOfNewUserRegistration(user)
+        .catch(err => logger.error('Cannot notify moderators of new user registration (%s).', user.username, { err }))
+  }
+
+  notifyOfNewFollow (actorFollow: ActorFollowModel): void {
+    this.notifyUserOfNewActorFollow(actorFollow)
+      .catch(err => {
+        logger.error(
+          'Cannot notify owner of channel %s of a new follow by %s.',
+          actorFollow.ActorFollowing.VideoChannel.getDisplayName(),
+          actorFollow.ActorFollower.Account.getDisplayName(),
+          err
+        )
+      })
+  }
+
+  private async notifySubscribersOfNewVideo (video: VideoModel) {
+    // List all followers that are users
+    const users = await UserModel.listUserSubscribersOf(video.VideoChannel.actorId)
+
+    logger.info('Notifying %d users of new video %s.', users.length, video.url)
+
+    function settingGetter (user: UserModel) {
+      return user.NotificationSetting.newVideoFromSubscription
+    }
+
+    async function notificationCreator (user: UserModel) {
+      const notification = await UserNotificationModel.create({
+        type: UserNotificationType.NEW_VIDEO_FROM_SUBSCRIPTION,
+        userId: user.id,
+        videoId: video.id
+      })
+      notification.Video = video
+
+      return notification
+    }
+
+    function emailSender (emails: string[]) {
+      return Emailer.Instance.addNewVideoFromSubscriberNotification(emails, video)
+    }
+
+    return this.notify({ users, settingGetter, notificationCreator, emailSender })
+  }
+
+  private async notifyVideoOwnerOfNewComment (comment: VideoCommentModel) {
+    if (comment.Video.isOwned() === false) return
+
+    const user = await UserModel.loadByVideoId(comment.videoId)
+
+    // Not our user or user comments its own video
+    if (!user || comment.Account.userId === user.id) return
+
+    const accountMuted = await AccountBlocklistModel.isAccountMutedBy(user.Account.id, comment.accountId)
+    if (accountMuted) return
+
+    logger.info('Notifying user %s of new comment %s.', user.username, comment.url)
+
+    function settingGetter (user: UserModel) {
+      return user.NotificationSetting.newCommentOnMyVideo
+    }
+
+    async function notificationCreator (user: UserModel) {
+      const notification = await UserNotificationModel.create({
+        type: UserNotificationType.NEW_COMMENT_ON_MY_VIDEO,
+        userId: user.id,
+        commentId: comment.id
+      })
+      notification.Comment = comment
+
+      return notification
+    }
+
+    function emailSender (emails: string[]) {
+      return Emailer.Instance.addNewCommentOnMyVideoNotification(emails, comment)
+    }
+
+    return this.notify({ users: [ user ], settingGetter, notificationCreator, emailSender })
+  }
+
+  private async notifyOfCommentMention (comment: VideoCommentModel) {
+    const usernames = comment.extractMentions()
+    let users = await UserModel.listByUsernames(usernames)
+
+    if (comment.Video.isOwned()) {
+      const userException = await UserModel.loadByVideoId(comment.videoId)
+      users = users.filter(u => u.id !== userException.id)
+    }
+
+    // Don't notify if I mentioned myself
+    users = users.filter(u => u.Account.id !== comment.accountId)
+
+    if (users.length === 0) return
+
+    const accountMutedHash = await AccountBlocklistModel.isAccountMutedByMulti(users.map(u => u.Account.id), comment.accountId)
+
+    logger.info('Notifying %d users of new comment %s.', users.length, comment.url)
+
+    function settingGetter (user: UserModel) {
+      if (accountMutedHash[user.Account.id] === true) return UserNotificationSettingValue.NONE
+
+      return user.NotificationSetting.commentMention
+    }
+
+    async function notificationCreator (user: UserModel) {
+      const notification = await UserNotificationModel.create({
+        type: UserNotificationType.COMMENT_MENTION,
+        userId: user.id,
+        commentId: comment.id
+      })
+      notification.Comment = comment
+
+      return notification
+    }
+
+    function emailSender (emails: string[]) {
+      return Emailer.Instance.addNewCommentMentionNotification(emails, comment)
+    }
+
+    return this.notify({ users, settingGetter, notificationCreator, emailSender })
+  }
+
+  private async notifyUserOfNewActorFollow (actorFollow: ActorFollowModel) {
+    if (actorFollow.ActorFollowing.isOwned() === false) return
+
+    // Account follows one of our account?
+    let followType: 'account' | 'channel' = 'channel'
+    let user = await UserModel.loadByChannelActorId(actorFollow.ActorFollowing.id)
+
+    // Account follows one of our channel?
+    if (!user) {
+      user = await UserModel.loadByAccountActorId(actorFollow.ActorFollowing.id)
+      followType = 'account'
+    }
+
+    if (!user) return
+
+    if (!actorFollow.ActorFollower.Account || !actorFollow.ActorFollower.Account.name) {
+      actorFollow.ActorFollower.Account = await actorFollow.ActorFollower.$get('Account') as AccountModel
+    }
+    const followerAccount = actorFollow.ActorFollower.Account
+
+    const accountMuted = await AccountBlocklistModel.isAccountMutedBy(user.Account.id, followerAccount.id)
+    if (accountMuted) return
+
+    logger.info('Notifying user %s of new follower: %s.', user.username, followerAccount.getDisplayName())
+
+    function settingGetter (user: UserModel) {
+      return user.NotificationSetting.newFollow
+    }
+
+    async function notificationCreator (user: UserModel) {
+      const notification = await UserNotificationModel.create({
+        type: UserNotificationType.NEW_FOLLOW,
+        userId: user.id,
+        actorFollowId: actorFollow.id
+      })
+      notification.ActorFollow = actorFollow
+
+      return notification
+    }
+
+    function emailSender (emails: string[]) {
+      return Emailer.Instance.addNewFollowNotification(emails, actorFollow, followType)
+    }
+
+    return this.notify({ users: [ user ], settingGetter, notificationCreator, emailSender })
+  }
+
+  private async notifyModeratorsOfNewVideoAbuse (videoAbuse: VideoAbuseModel) {
+    const moderators = await UserModel.listWithRight(UserRight.MANAGE_VIDEO_ABUSES)
+    if (moderators.length === 0) return
+
+    logger.info('Notifying %s user/moderators of new video abuse %s.', moderators.length, videoAbuse.Video.url)
+
+    function settingGetter (user: UserModel) {
+      return user.NotificationSetting.videoAbuseAsModerator
+    }
+
+    async function notificationCreator (user: UserModel) {
+      const notification = await UserNotificationModel.create({
+        type: UserNotificationType.NEW_VIDEO_ABUSE_FOR_MODERATORS,
+        userId: user.id,
+        videoAbuseId: videoAbuse.id
+      })
+      notification.VideoAbuse = videoAbuse
+
+      return notification
+    }
+
+    function emailSender (emails: string[]) {
+      return Emailer.Instance.addVideoAbuseModeratorsNotification(emails, videoAbuse)
+    }
+
+    return this.notify({ users: moderators, settingGetter, notificationCreator, emailSender })
+  }
+
+  private async notifyVideoOwnerOfBlacklist (videoBlacklist: VideoBlacklistModel) {
+    const user = await UserModel.loadByVideoId(videoBlacklist.videoId)
+    if (!user) return
+
+    logger.info('Notifying user %s that its video %s has been blacklisted.', user.username, videoBlacklist.Video.url)
+
+    function settingGetter (user: UserModel) {
+      return user.NotificationSetting.blacklistOnMyVideo
+    }
+
+    async function notificationCreator (user: UserModel) {
+      const notification = await UserNotificationModel.create({
+        type: UserNotificationType.BLACKLIST_ON_MY_VIDEO,
+        userId: user.id,
+        videoBlacklistId: videoBlacklist.id
+      })
+      notification.VideoBlacklist = videoBlacklist
+
+      return notification
+    }
+
+    function emailSender (emails: string[]) {
+      return Emailer.Instance.addVideoBlacklistNotification(emails, videoBlacklist)
+    }
+
+    return this.notify({ users: [ user ], settingGetter, notificationCreator, emailSender })
+  }
+
+  private async notifyVideoOwnerOfUnblacklist (video: VideoModel) {
+    const user = await UserModel.loadByVideoId(video.id)
+    if (!user) return
+
+    logger.info('Notifying user %s that its video %s has been unblacklisted.', user.username, video.url)
+
+    function settingGetter (user: UserModel) {
+      return user.NotificationSetting.blacklistOnMyVideo
+    }
+
+    async function notificationCreator (user: UserModel) {
+      const notification = await UserNotificationModel.create({
+        type: UserNotificationType.UNBLACKLIST_ON_MY_VIDEO,
+        userId: user.id,
+        videoId: video.id
+      })
+      notification.Video = video
+
+      return notification
+    }
+
+    function emailSender (emails: string[]) {
+      return Emailer.Instance.addVideoUnblacklistNotification(emails, video)
+    }
+
+    return this.notify({ users: [ user ], settingGetter, notificationCreator, emailSender })
+  }
+
+  private async notifyOwnedVideoHasBeenPublished (video: VideoModel) {
+    const user = await UserModel.loadByVideoId(video.id)
+    if (!user) return
+
+    logger.info('Notifying user %s of the publication of its video %s.', user.username, video.url)
+
+    function settingGetter (user: UserModel) {
+      return user.NotificationSetting.myVideoPublished
+    }
+
+    async function notificationCreator (user: UserModel) {
+      const notification = await UserNotificationModel.create({
+        type: UserNotificationType.MY_VIDEO_PUBLISHED,
+        userId: user.id,
+        videoId: video.id
+      })
+      notification.Video = video
+
+      return notification
+    }
+
+    function emailSender (emails: string[]) {
+      return Emailer.Instance.myVideoPublishedNotification(emails, video)
+    }
+
+    return this.notify({ users: [ user ], settingGetter, notificationCreator, emailSender })
+  }
+
+  private async notifyOwnerVideoImportIsFinished (videoImport: VideoImportModel, success: boolean) {
+    const user = await UserModel.loadByVideoImportId(videoImport.id)
+    if (!user) return
+
+    logger.info('Notifying user %s its video import %s is finished.', user.username, videoImport.getTargetIdentifier())
+
+    function settingGetter (user: UserModel) {
+      return user.NotificationSetting.myVideoImportFinished
+    }
+
+    async function notificationCreator (user: UserModel) {
+      const notification = await UserNotificationModel.create({
+        type: success ? UserNotificationType.MY_VIDEO_IMPORT_SUCCESS : UserNotificationType.MY_VIDEO_IMPORT_ERROR,
+        userId: user.id,
+        videoImportId: videoImport.id
+      })
+      notification.VideoImport = videoImport
+
+      return notification
+    }
+
+    function emailSender (emails: string[]) {
+      return success
+        ? Emailer.Instance.myVideoImportSuccessNotification(emails, videoImport)
+        : Emailer.Instance.myVideoImportErrorNotification(emails, videoImport)
+    }
+
+    return this.notify({ users: [ user ], settingGetter, notificationCreator, emailSender })
+  }
+
+  private async notifyModeratorsOfNewUserRegistration (registeredUser: UserModel) {
+    const moderators = await UserModel.listWithRight(UserRight.MANAGE_USERS)
+    if (moderators.length === 0) return
+
+    logger.info(
+      'Notifying %s moderators of new user registration of %s.',
+      moderators.length, registeredUser.Account.Actor.preferredUsername
+    )
+
+    function settingGetter (user: UserModel) {
+      return user.NotificationSetting.newUserRegistration
+    }
+
+    async function notificationCreator (user: UserModel) {
+      const notification = await UserNotificationModel.create({
+        type: UserNotificationType.NEW_USER_REGISTRATION,
+        userId: user.id,
+        accountId: registeredUser.Account.id
+      })
+      notification.Account = registeredUser.Account
+
+      return notification
+    }
+
+    function emailSender (emails: string[]) {
+      return Emailer.Instance.addNewUserRegistrationNotification(emails, registeredUser)
+    }
+
+    return this.notify({ users: moderators, settingGetter, notificationCreator, emailSender })
+  }
+
+  private async notify (options: {
+    users: UserModel[],
+    notificationCreator: (user: UserModel) => Promise<UserNotificationModel>,
+    emailSender: (emails: string[]) => Promise<any> | Bluebird<any>,
+    settingGetter: (user: UserModel) => UserNotificationSettingValue
+  }) {
+    const emails: string[] = []
+
+    for (const user of options.users) {
+      if (this.isWebNotificationEnabled(options.settingGetter(user))) {
+        const notification = await options.notificationCreator(user)
+
+        PeerTubeSocket.Instance.sendNotification(user.id, notification)
+      }
+
+      if (this.isEmailEnabled(user, options.settingGetter(user))) {
+        emails.push(user.email)
+      }
+    }
+
+    if (emails.length !== 0) {
+      await options.emailSender(emails)
+    }
+  }
+
+  private isEmailEnabled (user: UserModel, value: UserNotificationSettingValue) {
+    if (CONFIG.SIGNUP.REQUIRES_EMAIL_VERIFICATION === true && user.emailVerified !== true) return false
+
+    return value & UserNotificationSettingValue.EMAIL
+  }
+
+  private isWebNotificationEnabled (value: UserNotificationSettingValue) {
+    return value & UserNotificationSettingValue.WEB
+  }
+
+  static get Instance () {
+    return this.instance || (this.instance = new this())
+  }
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  Notifier
+}
diff --git a/server/lib/oauth-model.ts b/server/lib/oauth-model.ts
index 5cbe60b82..2cd2ae97c 100644
--- a/server/lib/oauth-model.ts
+++ b/server/lib/oauth-model.ts
@@ -1,3 +1,4 @@
+import * as Bluebird from 'bluebird'
 import { AccessDeniedError } from 'oauth2-server'
 import { logger } from '../helpers/logger'
 import { UserModel } from '../models/account/user'
@@ -37,7 +38,7 @@ function clearCacheByToken (token: string) {
 function getAccessToken (bearerToken: string) {
   logger.debug('Getting access token (bearerToken: ' + bearerToken + ').')
 
-  if (accessTokenCache[bearerToken] !== undefined) return accessTokenCache[bearerToken]
+  if (accessTokenCache[bearerToken] !== undefined) return Bluebird.resolve(accessTokenCache[bearerToken])
 
   return OAuthTokenModel.getByTokenAndPopulateUser(bearerToken)
     .then(tokenModel => {
diff --git a/server/lib/peertube-socket.ts b/server/lib/peertube-socket.ts
new file mode 100644
index 000000000..eb84ecd4b
--- /dev/null
+++ b/server/lib/peertube-socket.ts
@@ -0,0 +1,52 @@
+import * as SocketIO from 'socket.io'
+import { authenticateSocket } from '../middlewares'
+import { UserNotificationModel } from '../models/account/user-notification'
+import { logger } from '../helpers/logger'
+import { Server } from 'http'
+
+class PeerTubeSocket {
+
+  private static instance: PeerTubeSocket
+
+  private userNotificationSockets: { [ userId: number ]: SocketIO.Socket } = {}
+
+  private constructor () {}
+
+  init (server: Server) {
+    const io = SocketIO(server)
+
+    io.of('/user-notifications')
+      .use(authenticateSocket)
+      .on('connection', socket => {
+        const userId = socket.handshake.query.user.id
+
+        logger.debug('User %d connected on the notification system.', userId)
+
+        this.userNotificationSockets[userId] = socket
+
+        socket.on('disconnect', () => {
+          logger.debug('User %d disconnected from SocketIO notifications.', userId)
+
+          delete this.userNotificationSockets[userId]
+        })
+      })
+  }
+
+  sendNotification (userId: number, notification: UserNotificationModel) {
+    const socket = this.userNotificationSockets[userId]
+
+    if (!socket) return
+
+    socket.emit('new-notification', notification.toFormattedJSON())
+  }
+
+  static get Instance () {
+    return this.instance || (this.instance = new this())
+  }
+}
+
+// ---------------------------------------------------------------------------
+
+export {
+  PeerTubeSocket
+}
diff --git a/server/lib/redis.ts b/server/lib/redis.ts
index abd75d512..3628c0583 100644
--- a/server/lib/redis.ts
+++ b/server/lib/redis.ts
@@ -2,7 +2,13 @@ import * as express from 'express'
 import { createClient, RedisClient } from 'redis'
 import { logger } from '../helpers/logger'
 import { generateRandomString } from '../helpers/utils'
-import { CONFIG, USER_PASSWORD_RESET_LIFETIME, USER_EMAIL_VERIFY_LIFETIME, VIDEO_VIEW_LIFETIME } from '../initializers'
+import {
+  CONFIG,
+  CONTACT_FORM_LIFETIME,
+  USER_EMAIL_VERIFY_LIFETIME,
+  USER_PASSWORD_RESET_LIFETIME,
+  VIDEO_VIEW_LIFETIME
+} from '../initializers'
 
 type CachedRoute = {
   body: string,
@@ -76,6 +82,16 @@ class Redis {
     return this.getValue(this.generateVerifyEmailKey(userId))
   }
 
+  /************* Contact form per IP *************/
+
+  async setContactFormIp (ip: string) {
+    return this.setValue(this.generateContactFormKey(ip), '1', CONTACT_FORM_LIFETIME)
+  }
+
+  async isContactFormIpExists (ip: string) {
+    return this.exists(this.generateContactFormKey(ip))
+  }
+
   /************* Views per IP *************/
 
   setIPVideoView (ip: string, videoUUID: string) {
@@ -121,7 +137,14 @@ class Redis {
     const key = this.generateVideoViewKey(videoId, hour)
 
     const valueString = await this.getValue(key)
-    return parseInt(valueString, 10)
+    const valueInt = parseInt(valueString, 10)
+
+    if (isNaN(valueInt)) {
+      logger.error('Cannot get videos views of video %d in hour %d: views number is NaN (%s).', videoId, hour, valueString)
+      return undefined
+    }
+
+    return valueInt
   }
 
   async getVideosIdViewed (hour: number) {
@@ -168,7 +191,11 @@ class Redis {
   }
 
   private generateViewKey (ip: string, videoUUID: string) {
-    return videoUUID + '-' + ip
+    return `views-${videoUUID}-${ip}`
+  }
+
+  private generateContactFormKey (ip: string) {
+    return 'contact-form-' + ip
   }
 
   /************* Redis helpers *************/
diff --git a/server/lib/schedulers/abstract-scheduler.ts b/server/lib/schedulers/abstract-scheduler.ts
index b9d0a4d17..86ea7aa38 100644
--- a/server/lib/schedulers/abstract-scheduler.ts
+++ b/server/lib/schedulers/abstract-scheduler.ts
@@ -1,8 +1,11 @@
+import { logger } from '../../helpers/logger'
+
 export abstract class AbstractScheduler {
 
   protected abstract schedulerIntervalMs: number
 
   private interval: NodeJS.Timer
+  private isRunning = false
 
   enable () {
     if (!this.schedulerIntervalMs) throw new Error('Interval is not correctly set.')
@@ -14,5 +17,18 @@ export abstract class AbstractScheduler {
     clearInterval(this.interval)
   }
 
-  abstract execute ()
+  async execute () {
+    if (this.isRunning === true) return
+    this.isRunning = true
+
+    try {
+      await this.internalExecute()
+    } catch (err) {
+      logger.error('Cannot execute %s scheduler.', this.constructor.name, { err })
+    } finally {
+      this.isRunning = false
+    }
+  }
+
+  protected abstract internalExecute (): Promise<any>
 }
diff --git a/server/lib/schedulers/bad-actor-follow-scheduler.ts b/server/lib/schedulers/actor-follow-scheduler.ts
index 617149aaf..3967be7f8 100644
--- a/server/lib/schedulers/bad-actor-follow-scheduler.ts
+++ b/server/lib/schedulers/actor-follow-scheduler.ts
@@ -3,18 +3,35 @@ import { logger } from '../../helpers/logger'
 import { ActorFollowModel } from '../../models/activitypub/actor-follow'
 import { AbstractScheduler } from './abstract-scheduler'
 import { SCHEDULER_INTERVALS_MS } from '../../initializers'
+import { ActorFollowScoreCache } from '../cache'
 
-export class BadActorFollowScheduler extends AbstractScheduler {
+export class ActorFollowScheduler extends AbstractScheduler {
 
   private static instance: AbstractScheduler
 
-  protected schedulerIntervalMs = SCHEDULER_INTERVALS_MS.badActorFollow
+  protected schedulerIntervalMs = SCHEDULER_INTERVALS_MS.actorFollowScores
 
   private constructor () {
     super()
   }
 
-  async execute () {
+  protected async internalExecute () {
+    await this.processPendingScores()
+
+    await this.removeBadActorFollows()
+  }
+
+  private async processPendingScores () {
+    const pendingScores = ActorFollowScoreCache.Instance.getPendingFollowsScoreCopy()
+
+    ActorFollowScoreCache.Instance.clearPendingFollowsScore()
+
+    for (const inbox of Object.keys(pendingScores)) {
+      await ActorFollowModel.updateFollowScore(inbox, pendingScores[inbox])
+    }
+  }
+
+  private async removeBadActorFollows () {
     if (!isTestInstance()) logger.info('Removing bad actor follows (scheduler).')
 
     try {
diff --git a/server/lib/schedulers/remove-old-jobs-scheduler.ts b/server/lib/schedulers/remove-old-jobs-scheduler.ts
index a29a6b800..4a4341ba9 100644
--- a/server/lib/schedulers/remove-old-jobs-scheduler.ts
+++ b/server/lib/schedulers/remove-old-jobs-scheduler.ts
@@ -14,10 +14,10 @@ export class RemoveOldJobsScheduler extends AbstractScheduler {
     super()
   }
 
-  async execute () {
-    if (!isTestInstance()) logger.info('Removing old jobs (scheduler).')
+  protected internalExecute () {
+    if (!isTestInstance()) logger.info('Removing old jobs in scheduler.')
 
-    JobQueue.Instance.removeOldJobs()
+    return JobQueue.Instance.removeOldJobs()
   }
 
   static get Instance () {
diff --git a/server/lib/schedulers/update-videos-scheduler.ts b/server/lib/schedulers/update-videos-scheduler.ts
index fd2edfd17..2618a5857 100644
--- a/server/lib/schedulers/update-videos-scheduler.ts
+++ b/server/lib/schedulers/update-videos-scheduler.ts
@@ -5,6 +5,8 @@ import { retryTransactionWrapper } from '../../helpers/database-utils'
 import { federateVideoIfNeeded } from '../activitypub'
 import { SCHEDULER_INTERVALS_MS, sequelizeTypescript } from '../../initializers'
 import { VideoPrivacy } from '../../../shared/models/videos'
+import { Notifier } from '../notifier'
+import { VideoModel } from '../../models/video/video'
 
 export class UpdateVideosScheduler extends AbstractScheduler {
 
@@ -12,30 +14,20 @@ export class UpdateVideosScheduler extends AbstractScheduler {
 
   protected schedulerIntervalMs = SCHEDULER_INTERVALS_MS.updateVideos
 
-  private isRunning = false
-
   private constructor () {
     super()
   }
 
-  async execute () {
-    if (this.isRunning === true) return
-    this.isRunning = true
-
-    try {
-      await retryTransactionWrapper(this.updateVideos.bind(this))
-    } catch (err) {
-      logger.error('Cannot execute update videos scheduler.', { err })
-    } finally {
-      this.isRunning = false
-    }
+  protected async internalExecute () {
+    return retryTransactionWrapper(this.updateVideos.bind(this))
   }
 
   private async updateVideos () {
     if (!await ScheduleVideoUpdateModel.areVideosToUpdate()) return undefined
 
-    return sequelizeTypescript.transaction(async t => {
+    const publishedVideos = await sequelizeTypescript.transaction(async t => {
       const schedules = await ScheduleVideoUpdateModel.listVideosToUpdate(t)
+      const publishedVideos: VideoModel[] = []
 
       for (const schedule of schedules) {
         const video = schedule.Video
@@ -50,11 +42,23 @@ export class UpdateVideosScheduler extends AbstractScheduler {
 
           await video.save({ transaction: t })
           await federateVideoIfNeeded(video, isNewVideo, t)
+
+          if (oldPrivacy === VideoPrivacy.UNLISTED || oldPrivacy === VideoPrivacy.PRIVATE) {
+            video.ScheduleVideoUpdate = schedule
+            publishedVideos.push(video)
+          }
         }
 
         await schedule.destroy({ transaction: t })
       }
+
+      return publishedVideos
     })
+
+    for (const v of publishedVideos) {
+      Notifier.Instance.notifyOnNewVideo(v)
+      Notifier.Instance.notifyOnPendingVideoPublished(v)
+    }
   }
 
   static get Instance () {
diff --git a/server/lib/schedulers/videos-redundancy-scheduler.ts b/server/lib/schedulers/videos-redundancy-scheduler.ts
index 8b7f33539..f643ee226 100644
--- a/server/lib/schedulers/videos-redundancy-scheduler.ts
+++ b/server/lib/schedulers/videos-redundancy-scheduler.ts
@@ -6,7 +6,7 @@ import { VideoRedundancyModel } from '../../models/redundancy/video-redundancy'
 import { VideoFileModel } from '../../models/video/video-file'
 import { downloadWebTorrentVideo } from '../../helpers/webtorrent'
 import { join } from 'path'
-import { rename } from 'fs-extra'
+import { move } from 'fs-extra'
 import { getServerActor } from '../../helpers/utils'
 import { sendCreateCacheFile, sendUpdateCacheFile } from '../activitypub/send'
 import { getVideoCacheFileActivityPubUrl } from '../activitypub/url'
@@ -16,7 +16,6 @@ import { getOrCreateVideoAndAccountAndChannel } from '../activitypub'
 export class VideosRedundancyScheduler extends AbstractScheduler {
 
   private static instance: AbstractScheduler
-  private executing = false
 
   protected schedulerIntervalMs = CONFIG.REDUNDANCY.VIDEOS.CHECK_INTERVAL
 
@@ -24,11 +23,7 @@ export class VideosRedundancyScheduler extends AbstractScheduler {
     super()
   }
 
-  async execute () {
-    if (this.executing) return
-
-    this.executing = true
-
+  protected async internalExecute () {
     for (const obj of CONFIG.REDUNDANCY.VIDEOS.STRATEGIES) {
       logger.info('Running redundancy scheduler for strategy %s.', obj.strategy)
 
@@ -57,8 +52,6 @@ export class VideosRedundancyScheduler extends AbstractScheduler {
     await this.extendsLocalExpiration()
 
     await this.purgeRemoteExpired()
-
-    this.executing = false
   }
 
   static get Instance () {
@@ -145,13 +138,13 @@ export class VideosRedundancyScheduler extends AbstractScheduler {
 
       const tmpPath = await downloadWebTorrentVideo({ magnetUri }, VIDEO_IMPORT_TIMEOUT)
 
-      const destPath = join(CONFIG.STORAGE.VIDEOS_DIR, video.getVideoFilename(file))
-      await rename(tmpPath, destPath)
+      const destPath = join(CONFIG.STORAGE.REDUNDANCY_DIR, video.getVideoFilename(file))
+      await move(tmpPath, destPath)
 
       const createdModel = await VideoRedundancyModel.create({
         expiresOn: this.buildNewExpiration(redundancy.minLifetime),
         url: getVideoCacheFileActivityPubUrl(file),
-        fileUrl: video.getVideoFileUrl(file, CONFIG.WEBSERVER.URL),
+        fileUrl: video.getVideoRedundancyUrl(file, CONFIG.WEBSERVER.URL),
         strategy: redundancy.strategy,
         videoFileId: file.id,
         actorId: serverActor.id
diff --git a/server/lib/schedulers/youtube-dl-update-scheduler.ts b/server/lib/schedulers/youtube-dl-update-scheduler.ts
index 461cd045e..aa027116d 100644
--- a/server/lib/schedulers/youtube-dl-update-scheduler.ts
+++ b/server/lib/schedulers/youtube-dl-update-scheduler.ts
@@ -12,7 +12,7 @@ export class YoutubeDlUpdateScheduler extends AbstractScheduler {
     super()
   }
 
-  execute () {
+  protected internalExecute () {
     return updateYoutubeDLBinary()
   }
 
diff --git a/server/lib/user.ts b/server/lib/user.ts
index 29d6d087d..a39ef6c3d 100644
--- a/server/lib/user.ts
+++ b/server/lib/user.ts
@@ -9,6 +9,8 @@ import { createVideoChannel } from './video-channel'
 import { VideoChannelModel } from '../models/video/video-channel'
 import { FilteredModelAttributes } from 'sequelize-typescript/lib/models/Model'
 import { ActorModel } from '../models/activitypub/actor'
+import { UserNotificationSettingModel } from '../models/account/user-notification-setting'
+import { UserNotificationSetting, UserNotificationSettingValue } from '../../shared/models/users'
 
 async function createUserAccountAndChannel (userToCreate: UserModel, validateUser = true) {
   const { user, account, videoChannel } = await sequelizeTypescript.transaction(async t => {
@@ -18,6 +20,8 @@ async function createUserAccountAndChannel (userToCreate: UserModel, validateUse
     }
 
     const userCreated = await userToCreate.save(userOptions)
+    userCreated.NotificationSetting = await createDefaultUserNotificationSettings(userCreated, t)
+
     const accountCreated = await createLocalAccountWithoutKeys(userCreated.username, userCreated.id, null, t)
     userCreated.Account = accountCreated
 
@@ -88,3 +92,22 @@ export {
   createUserAccountAndChannel,
   createLocalAccountWithoutKeys
 }
+
+// ---------------------------------------------------------------------------
+
+function createDefaultUserNotificationSettings (user: UserModel, t: Sequelize.Transaction | undefined) {
+  const values: UserNotificationSetting & { userId: number } = {
+    userId: user.id,
+    newVideoFromSubscription: UserNotificationSettingValue.WEB,
+    newCommentOnMyVideo: UserNotificationSettingValue.WEB,
+    myVideoImportFinished: UserNotificationSettingValue.WEB,
+    myVideoPublished: UserNotificationSettingValue.WEB,
+    videoAbuseAsModerator: UserNotificationSettingValue.WEB | UserNotificationSettingValue.EMAIL,
+    blacklistOnMyVideo: UserNotificationSettingValue.WEB | UserNotificationSettingValue.EMAIL,
+    newUserRegistration: UserNotificationSettingValue.WEB,
+    commentMention: UserNotificationSettingValue.WEB,
+    newFollow: UserNotificationSettingValue.WEB
+  }
+
+  return UserNotificationSettingModel.create(values, { transaction: t })
+}
diff --git a/server/lib/video-transcoding.ts b/server/lib/video-transcoding.ts
index a78de61e5..4460f46e4 100644
--- a/server/lib/video-transcoding.ts
+++ b/server/lib/video-transcoding.ts
@@ -1,7 +1,7 @@
 import { CONFIG } from '../initializers'
 import { extname, join } from 'path'
 import { getVideoFileFPS, getVideoFileResolution, transcode } from '../helpers/ffmpeg-utils'
-import { copy, remove, rename, stat } from 'fs-extra'
+import { copy, remove, move, stat } from 'fs-extra'
 import { logger } from '../helpers/logger'
 import { VideoResolution } from '../../shared/models/videos'
 import { VideoFileModel } from '../models/video/video-file'
@@ -30,7 +30,7 @@ async function optimizeVideofile (video: VideoModel, inputVideoFileArg?: VideoFi
     inputVideoFile.set('extname', newExtname)
 
     const videoOutputPath = video.getVideoFilePath(inputVideoFile)
-    await rename(videoTranscodedPath, videoOutputPath)
+    await move(videoTranscodedPath, videoOutputPath)
     const stats = await stat(videoOutputPath)
     const fps = await getVideoFileFPS(videoOutputPath)