2 files changed, 16 insertions, 5 deletions

diff --git a/server/controllers/api/videos/import.ts b/server/controllers/api/videos/import.ts
index fb2de5dc0..be96ef42c 100644
--- a/server/controllers/api/videos/import.ts
+++ b/server/controllers/api/videos/import.ts
@@ -159,7 +159,7 @@ async function addYoutubeDLImport (req: express.Request, res: express.Response)
   thumbnailModel = await processThumbnail(req, video)
 
   // Process video thumbnail from url if processing from request.files failed
-  if (!thumbnailModel) {
+  if (!thumbnailModel && youtubeDLInfo.thumbnailUrl) {
     thumbnailModel = await processThumbnailFromUrl(youtubeDLInfo.thumbnailUrl, video)
   }
 
@@ -169,7 +169,7 @@ async function addYoutubeDLImport (req: express.Request, res: express.Response)
   previewModel = await processPreview(req, video)
 
   // Process video preview from url if processing from request.files failed
-  if (!previewModel) {
+  if (!previewModel && youtubeDLInfo.thumbnailUrl) {
     previewModel = await processPreviewFromUrl(youtubeDLInfo.thumbnailUrl, video)
   }
 
@@ -236,7 +236,7 @@ function buildVideo (channelId: number, body: VideoImportCreate, importData: You
     remote: false,
     category: body.category || importData.category,
     licence: body.licence || importData.licence,
-    language: body.language || undefined,
+    language: body.language || importData.language,
     commentsEnabled: body.commentsEnabled !== false, // If the value is not "false", the default is "true"
     downloadEnabled: body.downloadEnabled !== false,
     waitTranscoding: body.waitTranscoding || false,
diff --git a/server/helpers/youtube-dl.ts b/server/helpers/youtube-dl.ts
index 6d2e6f6d1..f0944b94f 100644
--- a/server/helpers/youtube-dl.ts
+++ b/server/helpers/youtube-dl.ts
@@ -1,4 +1,4 @@
-import { CONSTRAINTS_FIELDS, VIDEO_CATEGORIES } from '../initializers/constants'
+import { CONSTRAINTS_FIELDS, VIDEO_CATEGORIES, VIDEO_LANGUAGES, VIDEO_LICENCES } from '../initializers/constants'
 import { logger } from './logger'
 import { generateVideoImportTmpPath } from './utils'
 import { join } from 'path'
@@ -12,6 +12,7 @@ export type YoutubeDLInfo = {
   name?: string
   description?: string
   category?: number
+  language?: string
   licence?: number
   nsfw?: boolean
   tags?: string[]
@@ -252,12 +253,13 @@ function normalizeObject (obj: any) {
   return newObj
 }
 
-function buildVideoInfo (obj: any) {
+function buildVideoInfo (obj: any): YoutubeDLInfo {
   return {
     name: titleTruncation(obj.title),
     description: descriptionTruncation(obj.description),
     category: getCategory(obj.categories),
     licence: getLicence(obj.license),
+    language: getLanguage(obj.language),
     nsfw: isNSFW(obj),
     tags: getTags(obj.tags),
     thumbnailUrl: obj.thumbnail || undefined,
@@ -302,6 +304,11 @@ function getLicence (licence: string) {
 
   if (licence.includes('Creative Commons Attribution')) return 1
 
+  for (const key of Object.keys(VIDEO_LICENCES)) {
+    const peertubeLicence = VIDEO_LICENCES[key]
+    if (peertubeLicence.toLowerCase() === licence.toLowerCase()) return parseInt(key, 10)
+  }
+
   return undefined
 }
 
@@ -321,6 +328,10 @@ function getCategory (categories: string[]) {
   return undefined
 }
 
+function getLanguage (language: string) {
+  return VIDEO_LANGUAGES[language] ? language : undefined
+}
+
 function wrapWithProxyOptions (options: string[]) {
   if (CONFIG.IMPORT.VIDEOS.HTTP.PROXY.ENABLED) {
     logger.debug('Using proxy for YoutubeDL')