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diff --git a/server/tests/api/redundancy/redundancy.ts b/server/tests/api/redundancy/redundancy.ts
new file mode 100644
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+++ b/server/tests/api/redundancy/redundancy.ts
@@ -0,0 +1,483 @@
+/* tslint:disable:no-unused-expression */
+
+import * as chai from 'chai'
+import 'mocha'
+import { VideoDetails } from '../../../../shared/models/videos'
+import {
+  doubleFollow,
+  flushAndRunMultipleServers,
+  getFollowingListPaginationAndSort,
+  getVideo,
+  immutableAssign,
+  killallServers, makeGetRequest,
+  root,
+  ServerInfo,
+  setAccessTokensToServers, unfollow,
+  uploadVideo,
+  viewVideo,
+  wait,
+  waitUntilLog,
+  checkVideoFilesWereRemoved, removeVideo
+} from '../../utils'
+import { waitJobs } from '../../utils/server/jobs'
+import * as magnetUtil from 'magnet-uri'
+import { updateRedundancy } from '../../utils/server/redundancy'
+import { ActorFollow } from '../../../../shared/models/actors'
+import { readdir } from 'fs-extra'
+import { join } from 'path'
+import { VideoRedundancyStrategy } from '../../../../shared/models/redundancy'
+import { getStats } from '../../utils/server/stats'
+import { ServerStats } from '../../../../shared/models/server/server-stats.model'
+
+const expect = chai.expect
+
+let servers: ServerInfo[] = []
+let video1Server2UUID: string
+
+function checkMagnetWebseeds (file: { magnetUri: string, resolution: { id: number } }, baseWebseeds: string[], server: ServerInfo) {
+  const parsed = magnetUtil.decode(file.magnetUri)
+
+  for (const ws of baseWebseeds) {
+    const found = parsed.urlList.find(url => url === `${ws}-${file.resolution.id}.mp4`)
+    expect(found, `Webseed ${ws} not found in ${file.magnetUri} on server ${server.url}`).to.not.be.undefined
+  }
+
+  expect(parsed.urlList).to.have.lengthOf(baseWebseeds.length)
+}
+
+async function runServers (strategy: VideoRedundancyStrategy, additionalParams: any = {}) {
+  const config = {
+    redundancy: {
+      videos: {
+        check_interval: '5 seconds',
+        strategies: [
+          immutableAssign({
+            min_lifetime: '1 hour',
+            strategy: strategy,
+            size: '100KB'
+          }, additionalParams)
+        ]
+      }
+    }
+  }
+  servers = await flushAndRunMultipleServers(3, config)
+
+  // Get the access tokens
+  await setAccessTokensToServers(servers)
+
+  {
+    const res = await uploadVideo(servers[ 1 ].url, servers[ 1 ].accessToken, { name: 'video 1 server 2' })
+    video1Server2UUID = res.body.video.uuid
+
+    await viewVideo(servers[ 1 ].url, video1Server2UUID)
+  }
+
+  await waitJobs(servers)
+
+  // Server 1 and server 2 follow each other
+  await doubleFollow(servers[ 0 ], servers[ 1 ])
+  // Server 1 and server 3 follow each other
+  await doubleFollow(servers[ 0 ], servers[ 2 ])
+  // Server 2 and server 3 follow each other
+  await doubleFollow(servers[ 1 ], servers[ 2 ])
+
+  await waitJobs(servers)
+}
+
+async function check1WebSeed (strategy: VideoRedundancyStrategy, videoUUID?: string) {
+  if (!videoUUID) videoUUID = video1Server2UUID
+
+  const webseeds = [
+    'http://localhost:9002/static/webseed/' + videoUUID
+  ]
+
+  for (const server of servers) {
+    {
+      const res = await getVideo(server.url, videoUUID)
+
+      const video: VideoDetails = res.body
+      for (const f of video.files) {
+        checkMagnetWebseeds(f, webseeds, server)
+      }
+    }
+  }
+}
+
+async function checkStatsWith2Webseed (strategy: VideoRedundancyStrategy) {
+  const res = await getStats(servers[0].url)
+  const data: ServerStats = res.body
+
+  expect(data.videosRedundancy).to.have.lengthOf(1)
+  const stat = data.videosRedundancy[0]
+
+  expect(stat.strategy).to.equal(strategy)
+  expect(stat.totalSize).to.equal(102400)
+  expect(stat.totalUsed).to.be.at.least(1).and.below(102401)
+  expect(stat.totalVideoFiles).to.equal(4)
+  expect(stat.totalVideos).to.equal(1)
+}
+
+async function checkStatsWith1Webseed (strategy: VideoRedundancyStrategy) {
+  const res = await getStats(servers[0].url)
+  const data: ServerStats = res.body
+
+  expect(data.videosRedundancy).to.have.lengthOf(1)
+
+  const stat = data.videosRedundancy[0]
+  expect(stat.strategy).to.equal(strategy)
+  expect(stat.totalSize).to.equal(102400)
+  expect(stat.totalUsed).to.equal(0)
+  expect(stat.totalVideoFiles).to.equal(0)
+  expect(stat.totalVideos).to.equal(0)
+}
+
+async function check2Webseeds (strategy: VideoRedundancyStrategy, videoUUID?: string) {
+  if (!videoUUID) videoUUID = video1Server2UUID
+
+  const webseeds = [
+    'http://localhost:9001/static/webseed/' + videoUUID,
+    'http://localhost:9002/static/webseed/' + videoUUID
+  ]
+
+  for (const server of servers) {
+    const res = await getVideo(server.url, videoUUID)
+
+    const video: VideoDetails = res.body
+
+    for (const file of video.files) {
+      checkMagnetWebseeds(file, webseeds, server)
+
+      // Only servers 1 and 2 have the video
+      if (server.serverNumber !== 3) {
+        await makeGetRequest({
+          url: server.url,
+          statusCodeExpected: 200,
+          path: '/static/webseed/' + `${videoUUID}-${file.resolution.id}.mp4`,
+          contentType: null
+        })
+      }
+    }
+  }
+
+  for (const directory of [ 'test1', 'test2' ]) {
+    const files = await readdir(join(root(), directory, 'videos'))
+    expect(files).to.have.length.at.least(4)
+
+    for (const resolution of [ 240, 360, 480, 720 ]) {
+      expect(files.find(f => f === `${videoUUID}-${resolution}.mp4`)).to.not.be.undefined
+    }
+  }
+}
+
+async function enableRedundancyOnServer1 () {
+  await updateRedundancy(servers[ 0 ].url, servers[ 0 ].accessToken, servers[ 1 ].host, true)
+
+  const res = await getFollowingListPaginationAndSort(servers[ 0 ].url, 0, 5, '-createdAt')
+  const follows: ActorFollow[] = res.body.data
+  const server2 = follows.find(f => f.following.host === 'localhost:9002')
+  const server3 = follows.find(f => f.following.host === 'localhost:9003')
+
+  expect(server3).to.not.be.undefined
+  expect(server3.following.hostRedundancyAllowed).to.be.false
+
+  expect(server2).to.not.be.undefined
+  expect(server2.following.hostRedundancyAllowed).to.be.true
+}
+
+async function disableRedundancyOnServer1 () {
+  await updateRedundancy(servers[ 0 ].url, servers[ 0 ].accessToken, servers[ 1 ].host, false)
+
+  const res = await getFollowingListPaginationAndSort(servers[ 0 ].url, 0, 5, '-createdAt')
+  const follows: ActorFollow[] = res.body.data
+  const server2 = follows.find(f => f.following.host === 'localhost:9002')
+  const server3 = follows.find(f => f.following.host === 'localhost:9003')
+
+  expect(server3).to.not.be.undefined
+  expect(server3.following.hostRedundancyAllowed).to.be.false
+
+  expect(server2).to.not.be.undefined
+  expect(server2.following.hostRedundancyAllowed).to.be.false
+}
+
+async function cleanServers () {
+  killallServers(servers)
+}
+
+describe('Test videos redundancy', function () {
+
+  describe('With most-views strategy', function () {
+    const strategy = 'most-views'
+
+    before(function () {
+      this.timeout(120000)
+
+      return runServers(strategy)
+    })
+
+    it('Should have 1 webseed on the first video', async function () {
+      await check1WebSeed(strategy)
+      await checkStatsWith1Webseed(strategy)
+    })
+
+    it('Should enable redundancy on server 1', function () {
+      return enableRedundancyOnServer1()
+    })
+
+    it('Should have 2 webseed on the first video', async function () {
+      this.timeout(40000)
+
+      await waitJobs(servers)
+      await waitUntilLog(servers[0], 'Duplicated ', 4)
+      await waitJobs(servers)
+
+      await check2Webseeds(strategy)
+      await checkStatsWith2Webseed(strategy)
+    })
+
+    it('Should undo redundancy on server 1 and remove duplicated videos', async function () {
+      this.timeout(40000)
+
+      await disableRedundancyOnServer1()
+
+      await waitJobs(servers)
+      await wait(5000)
+
+      await check1WebSeed(strategy)
+
+      await checkVideoFilesWereRemoved(video1Server2UUID, servers[0].serverNumber, [ 'videos' ])
+    })
+
+    after(function () {
+      return cleanServers()
+    })
+  })
+
+  describe('With trending strategy', function () {
+    const strategy = 'trending'
+
+    before(function () {
+      this.timeout(120000)
+
+      return runServers(strategy)
+    })
+
+    it('Should have 1 webseed on the first video', async function () {
+      await check1WebSeed(strategy)
+      await checkStatsWith1Webseed(strategy)
+    })
+
+    it('Should enable redundancy on server 1', function () {
+      return enableRedundancyOnServer1()
+    })
+
+    it('Should have 2 webseed on the first video', async function () {
+      this.timeout(40000)
+
+      await waitJobs(servers)
+      await waitUntilLog(servers[0], 'Duplicated ', 4)
+      await waitJobs(servers)
+
+      await check2Webseeds(strategy)
+      await checkStatsWith2Webseed(strategy)
+    })
+
+    it('Should unfollow on server 1 and remove duplicated videos', async function () {
+      this.timeout(40000)
+
+      await unfollow(servers[0].url, servers[0].accessToken, servers[1])
+
+      await waitJobs(servers)
+      await wait(5000)
+
+      await check1WebSeed(strategy)
+
+      await checkVideoFilesWereRemoved(video1Server2UUID, servers[0].serverNumber, [ 'videos' ])
+    })
+
+    after(function () {
+      return cleanServers()
+    })
+  })
+
+  describe('With recently added strategy', function () {
+    const strategy = 'recently-added'
+
+    before(function () {
+      this.timeout(120000)
+
+      return runServers(strategy, { min_views: 3 })
+    })
+
+    it('Should have 1 webseed on the first video', async function () {
+      await check1WebSeed(strategy)
+      await checkStatsWith1Webseed(strategy)
+    })
+
+    it('Should enable redundancy on server 1', function () {
+      return enableRedundancyOnServer1()
+    })
+
+    it('Should still have 1 webseed on the first video', async function () {
+      this.timeout(40000)
+
+      await waitJobs(servers)
+      await wait(15000)
+      await waitJobs(servers)
+
+      await check1WebSeed(strategy)
+      await checkStatsWith1Webseed(strategy)
+    })
+
+    it('Should view 2 times the first video to have > min_views config', async function () {
+      this.timeout(40000)
+
+      await viewVideo(servers[ 0 ].url, video1Server2UUID)
+      await viewVideo(servers[ 2 ].url, video1Server2UUID)
+
+      await wait(10000)
+      await waitJobs(servers)
+    })
+
+    it('Should have 2 webseed on the first video', async function () {
+      this.timeout(40000)
+
+      await waitJobs(servers)
+      await waitUntilLog(servers[0], 'Duplicated ', 4)
+      await waitJobs(servers)
+
+      await check2Webseeds(strategy)
+      await checkStatsWith2Webseed(strategy)
+    })
+
+    it('Should remove the video and the redundancy files', async function () {
+      this.timeout(20000)
+
+      await removeVideo(servers[1].url, servers[1].accessToken, video1Server2UUID)
+
+      await waitJobs(servers)
+
+      for (const server of servers) {
+        await checkVideoFilesWereRemoved(video1Server2UUID, server.serverNumber)
+      }
+    })
+
+    after(function () {
+      return cleanServers()
+    })
+  })
+
+  describe('Test expiration', function () {
+    const strategy = 'recently-added'
+
+    async function checkContains (servers: ServerInfo[], str: string) {
+      for (const server of servers) {
+        const res = await getVideo(server.url, video1Server2UUID)
+        const video: VideoDetails = res.body
+
+        for (const f of video.files) {
+          expect(f.magnetUri).to.contain(str)
+        }
+      }
+    }
+
+    async function checkNotContains (servers: ServerInfo[], str: string) {
+      for (const server of servers) {
+        const res = await getVideo(server.url, video1Server2UUID)
+        const video: VideoDetails = res.body
+
+        for (const f of video.files) {
+          expect(f.magnetUri).to.not.contain(str)
+        }
+      }
+    }
+
+    before(async function () {
+      this.timeout(120000)
+
+      await runServers(strategy, { min_lifetime: '7 seconds', min_views: 0 })
+
+      await enableRedundancyOnServer1()
+    })
+
+    it('Should still have 2 webseeds after 10 seconds', async function () {
+      this.timeout(40000)
+
+      await wait(10000)
+
+      try {
+        await checkContains(servers, 'http%3A%2F%2Flocalhost%3A9001')
+      } catch {
+        // Maybe a server deleted a redundancy in the scheduler
+        await wait(2000)
+
+        await checkContains(servers, 'http%3A%2F%2Flocalhost%3A9001')
+      }
+    })
+
+    it('Should stop server 1 and expire video redundancy', async function () {
+      this.timeout(40000)
+
+      killallServers([ servers[0] ])
+
+      await wait(10000)
+
+      await checkNotContains([ servers[1], servers[2] ], 'http%3A%2F%2Flocalhost%3A9001')
+    })
+
+    after(function () {
+      return killallServers([ servers[1], servers[2] ])
+    })
+  })
+
+  describe('Test file replacement', function () {
+    let video2Server2UUID: string
+    const strategy = 'recently-added'
+
+    before(async function () {
+      this.timeout(120000)
+
+      await runServers(strategy, { min_lifetime: '7 seconds', min_views: 0 })
+
+      await enableRedundancyOnServer1()
+
+      await waitJobs(servers)
+      await waitUntilLog(servers[0], 'Duplicated ', 4)
+      await waitJobs(servers)
+
+      await check2Webseeds(strategy)
+      await checkStatsWith2Webseed(strategy)
+
+      const res = await uploadVideo(servers[ 1 ].url, servers[ 1 ].accessToken, { name: 'video 2 server 2' })
+      video2Server2UUID = res.body.video.uuid
+    })
+
+    it('Should cache video 2 webseed on the first video', async function () {
+      this.timeout(50000)
+
+      await waitJobs(servers)
+
+      await wait(7000)
+
+      try {
+        await check1WebSeed(strategy, video1Server2UUID)
+        await check2Webseeds(strategy, video2Server2UUID)
+      } catch {
+        await wait(3000)
+
+        try {
+          await check1WebSeed(strategy, video1Server2UUID)
+          await check2Webseeds(strategy, video2Server2UUID)
+        } catch {
+          await wait(5000)
+
+          await check1WebSeed(strategy, video1Server2UUID)
+          await check2Webseeds(strategy, video2Server2UUID)
+        }
+      }
+    })
+
+    after(function () {
+      return cleanServers()
+    })
+  })
+})