Init commit

server/core/helpers/youtube-dl/index.ts

@@ -0,0 +1,3 @@
+export * from './youtube-dl-cli.js'
+export * from './youtube-dl-info-builder.js'
+export * from './youtube-dl-wrapper.js'

server/core/helpers/youtube-dl/youtube-dl-cli.ts

@@ -0,0 +1,284 @@
+import { randomInt } from '@peertube/peertube-core-utils'
+import { VideoResolution, VideoResolutionType } from '@peertube/peertube-models'
+import { CONFIG } from '@server/initializers/config.js'
+import { execa, Options as ExecaNodeOptions } from 'execa'
+import { ensureDir, pathExists } from 'fs-extra/esm'
+import { chmod, writeFile } from 'fs/promises'
+import { OptionsOfBufferResponseBody } from 'got'
+import { dirname, join } from 'path'
+import { logger, loggerTagsFactory } from '../logger.js'
+import { getProxy, isProxyEnabled } from '../proxy.js'
+import { isBinaryResponse, unsafeSSRFGot } from '../requests.js'
+
+type ProcessOptions = Pick<ExecaNodeOptions, 'cwd' | 'maxBuffer'>
+
+const lTags = loggerTagsFactory('youtube-dl')
+
+const youtubeDLBinaryPath = join(CONFIG.STORAGE.BIN_DIR, CONFIG.IMPORT.VIDEOS.HTTP.YOUTUBE_DL_RELEASE.NAME)
+
+export class YoutubeDLCLI {
+  static async safeGet () {
+    if (!await pathExists(youtubeDLBinaryPath)) {
+      await ensureDir(dirname(youtubeDLBinaryPath))
+
+      await this.updateYoutubeDLBinary()
+    }
+
+    return new YoutubeDLCLI()
+  }
+
+  static async updateYoutubeDLBinary () {
+    const url = CONFIG.IMPORT.VIDEOS.HTTP.YOUTUBE_DL_RELEASE.URL
+
+    logger.info('Updating youtubeDL binary from %s.', url, lTags())
+
+    const gotOptions: OptionsOfBufferResponseBody = {
+      context: { bodyKBLimit: 100_000 },
+      responseType: 'buffer' as 'buffer'
+    }
+
+    if (process.env.YOUTUBE_DL_DOWNLOAD_BEARER_TOKEN) {
+      gotOptions.headers = {
+        authorization: 'Bearer ' + process.env.YOUTUBE_DL_DOWNLOAD_BEARER_TOKEN
+      }
+    }
+
+    try {
+      let gotResult = await unsafeSSRFGot(url, gotOptions)
+
+      if (!isBinaryResponse(gotResult)) {
+        const json = JSON.parse(gotResult.body.toString())
+        const latest = json.filter(release => release.prerelease === false)[0]
+        if (!latest) throw new Error('Cannot find latest release')
+
+        const releaseName = CONFIG.IMPORT.VIDEOS.HTTP.YOUTUBE_DL_RELEASE.NAME
+        const releaseAsset = latest.assets.find(a => a.name === releaseName)
+        if (!releaseAsset) throw new Error(`Cannot find appropriate release with name ${releaseName} in release assets`)
+
+        gotResult = await unsafeSSRFGot(releaseAsset.browser_download_url, gotOptions)
+      }
+
+      if (!isBinaryResponse(gotResult)) {
+        throw new Error('Not a binary response')
+      }
+
+      await writeFile(youtubeDLBinaryPath, gotResult.body)
+
+      if (!CONFIG.IMPORT.VIDEOS.HTTP.YOUTUBE_DL_RELEASE.PYTHON_PATH) {
+        await chmod(youtubeDLBinaryPath, '744')
+      }
+
+      logger.info('youtube-dl updated %s.', youtubeDLBinaryPath, lTags())
+    } catch (err) {
+      logger.error('Cannot update youtube-dl from %s.', url, { err, ...lTags() })
+    }
+  }
+
+  static getYoutubeDLVideoFormat (enabledResolutions: VideoResolutionType[], useBestFormat: boolean) {
+    /**
+     * list of format selectors in order or preference
+     * see https://github.com/ytdl-org/youtube-dl#format-selection
+     *
+     * case #1 asks for a mp4 using h264 (avc1) and the exact resolution in the hope
+     * of being able to do a "quick-transcode"
+     * case #2 is the first fallback. No "quick-transcode" means we can get anything else (like vp9)
+     * case #3 is the resolution-degraded equivalent of #1, and already a pretty safe fallback
+     *
+     * in any case we avoid AV1, see https://github.com/Chocobozzz/PeerTube/issues/3499
+     */
+
+    let result: string[] = []
+
+    if (!useBestFormat) {
+      const resolution = enabledResolutions.length === 0
+        ? VideoResolution.H_720P
+        : Math.max(...enabledResolutions)
+
+      result = [
+        `bestvideo[vcodec^=avc1][height=${resolution}]+bestaudio[ext=m4a]`, // case #1
+        `bestvideo[vcodec!*=av01][vcodec!*=vp9.2][height=${resolution}]+bestaudio`, // case #2
+        `bestvideo[vcodec^=avc1][height<=${resolution}]+bestaudio[ext=m4a]` // case #
+      ]
+    }
+
+    return result.concat([
+      'bestvideo[vcodec!*=av01][vcodec!*=vp9.2]+bestaudio',
+      'best[vcodec!*=av01][vcodec!*=vp9.2]', // case fallback for known formats
+      'bestvideo[ext=mp4]+bestaudio[ext=m4a]',
+      'best' // Ultimate fallback
+    ]).join('/')
+  }
+
+  private constructor () {
+  }
+
+  download (options: {
+    url: string
+    format: string
+    output: string
+    processOptions: ProcessOptions
+    timeout?: number
+    additionalYoutubeDLArgs?: string[]
+  }) {
+    let args = options.additionalYoutubeDLArgs || []
+    args = args.concat([ '--merge-output-format', 'mp4', '-f', options.format, '-o', options.output ])
+
+    return this.run({
+      url: options.url,
+      processOptions: options.processOptions,
+      timeout: options.timeout,
+      args
+    })
+  }
+
+  async getInfo (options: {
+    url: string
+    format: string
+    processOptions: ProcessOptions
+    additionalYoutubeDLArgs?: string[]
+  }) {
+    const { url, format, additionalYoutubeDLArgs = [], processOptions } = options
+
+    const completeArgs = additionalYoutubeDLArgs.concat([ '--dump-json', '-f', format ])
+
+    const data = await this.run({ url, args: completeArgs, processOptions })
+    if (!data) return undefined
+
+    const info = data.map(d => JSON.parse(d))
+
+    return info.length === 1
+      ? info[0]
+      : info
+  }
+
+  async getListInfo (options: {
+    url: string
+    latestVideosCount?: number
+    processOptions: ProcessOptions
+  }): Promise<{ upload_date: string, webpage_url: string }[]> {
+    const additionalYoutubeDLArgs = [ '--skip-download', '--playlist-reverse' ]
+
+    if (CONFIG.IMPORT.VIDEOS.HTTP.YOUTUBE_DL_RELEASE.NAME === 'yt-dlp') {
+      // Optimize listing videos only when using yt-dlp because it is bugged with youtube-dl when fetching a channel
+      additionalYoutubeDLArgs.push('--flat-playlist')
+    }
+
+    if (options.latestVideosCount !== undefined) {
+      additionalYoutubeDLArgs.push('--playlist-end', options.latestVideosCount.toString())
+    }
+
+    const result = await this.getInfo({
+      url: options.url,
+      format: YoutubeDLCLI.getYoutubeDLVideoFormat([], false),
+      processOptions: options.processOptions,
+      additionalYoutubeDLArgs
+    })
+
+    if (!result) return result
+    if (!Array.isArray(result)) return [ result ]
+
+    return result
+  }
+
+  async getSubs (options: {
+    url: string
+    format: 'vtt'
+    processOptions: ProcessOptions
+  }) {
+    const { url, format, processOptions } = options
+
+    const args = [ '--skip-download', '--all-subs', `--sub-format=${format}` ]
+
+    const data = await this.run({ url, args, processOptions })
+    const files: string[] = []
+
+    const skipString = '[info] Writing video subtitles to: '
+
+    for (let i = 0, len = data.length; i < len; i++) {
+      const line = data[i]
+
+      if (line.startsWith(skipString)) {
+        files.push(line.slice(skipString.length))
+      }
+    }
+
+    return files
+  }
+
+  private async run (options: {
+    url: string
+    args: string[]
+    timeout?: number
+    processOptions: ProcessOptions
+  }) {
+    const { url, args, timeout, processOptions } = options
+
+    let completeArgs = this.wrapWithJSRuntimeOptions(args)
+    completeArgs = this.wrapWithProxyOptions(completeArgs)
+    completeArgs = this.wrapWithIPOptions(completeArgs)
+    completeArgs = this.wrapWithFFmpegOptions(completeArgs)
+
+    const subProcessBinary = CONFIG.IMPORT.VIDEOS.HTTP.YOUTUBE_DL_RELEASE.PYTHON_PATH || youtubeDLBinaryPath
+    const subProcessArgs = [ ...completeArgs, url ]
+    if (subProcessBinary !== youtubeDLBinaryPath) subProcessArgs.unshift(youtubeDLBinaryPath)
+
+    const subProcess = execa(subProcessBinary, subProcessArgs, processOptions)
+
+    if (timeout) {
+      setTimeout(() => subProcess.kill(), timeout)
+    }
+
+    const output = await subProcess
+
+    logger.debug('Run youtube-dl command.', { command: output.command, ...lTags() })
+
+    return output.stdout
+      ? output.stdout.trim().split(/\r?\n/)
+      : undefined
+  }
+
+  private wrapWithJSRuntimeOptions (args: string[]) {
+    if (CONFIG.IMPORT.VIDEOS.HTTP.YOUTUBE_DL_RELEASE.NAME === 'yt-dlp') {
+      return [ '--js-runtimes', 'node' ].concat(args)
+    }
+
+    return args
+  }
+
+  private wrapWithProxyOptions (args: string[]) {
+    const config = CONFIG.IMPORT.VIDEOS.HTTP.PROXIES
+    const configProxyEnabled = Array.isArray(config) && config.length !== 0
+
+    if (configProxyEnabled || isProxyEnabled()) {
+      const proxy = configProxyEnabled
+        ? config[randomInt(0, config.length)]
+        : getProxy()
+
+      logger.debug('Using proxy %s for YoutubeDL', proxy, lTags())
+
+      return [ '--proxy', proxy ].concat(args)
+    }
+
+    return args
+  }
+
+  private wrapWithIPOptions (args: string[]) {
+    if (CONFIG.IMPORT.VIDEOS.HTTP.FORCE_IPV4) {
+      logger.debug('Force ipv4 for YoutubeDL')
+
+      return [ '--force-ipv4' ].concat(args)
+    }
+
+    return args
+  }
+
+  private wrapWithFFmpegOptions (args: string[]) {
+    if (process.env.FFMPEG_PATH) {
+      logger.debug('Using ffmpeg location %s for YoutubeDL', process.env.FFMPEG_PATH, lTags())
+
+      return [ '--ffmpeg-location', process.env.FFMPEG_PATH ].concat(args)
+    }
+
+    return args
+  }
+}

server/core/helpers/youtube-dl/youtube-dl-info-builder.ts

@@ -0,0 +1,213 @@
+import { CONSTRAINTS_FIELDS, VIDEO_CATEGORIES, VIDEO_LANGUAGES, VIDEO_LICENCES } from '../../initializers/constants.js'
+import { peertubeTruncate } from '../core-utils.js'
+import { isUrlValid } from '../custom-validators/activitypub/misc.js'
+import { isArray } from '../custom-validators/misc.js'
+
+export type YoutubeDLInfo = {
+  name?: string
+  description?: string
+  category?: number
+  language?: string
+  licence?: number
+  nsfw?: boolean
+  tags?: string[]
+  thumbnailUrl?: string
+  ext?: string
+  originallyPublishedAtWithoutTime?: Date
+  webpageUrl?: string
+
+  urls?: string[]
+
+  chapters?: {
+    timecode: number
+    title: string
+  }[]
+}
+
+export class YoutubeDLInfoBuilder {
+  private readonly info: any
+
+  constructor (info: any) {
+    this.info = { ...info }
+  }
+
+  getInfo () {
+    const obj = this.buildVideoInfo(this.normalizeObject(this.info))
+    if (obj.name && obj.name.length < CONSTRAINTS_FIELDS.VIDEOS.NAME.min) obj.name += ' video'
+
+    return obj
+  }
+
+  private normalizeObject (obj: any) {
+    const newObj: any = {}
+
+    for (const key of Object.keys(obj)) {
+      // Deprecated key
+      if (key === 'resolution') continue
+
+      const value = obj[key]
+
+      if (typeof value === 'string') {
+        newObj[key] = value.normalize()
+      } else {
+        newObj[key] = value
+      }
+    }
+
+    return newObj
+  }
+
+  private buildOriginallyPublishedAt (obj: any) {
+    let originallyPublishedAt: Date = null
+
+    const uploadDateMatcher = /^(\d{4})(\d{2})(\d{2})$/.exec(obj.upload_date)
+    if (uploadDateMatcher) {
+      originallyPublishedAt = new Date()
+      originallyPublishedAt.setHours(0, 0, 0, 0)
+
+      const year = parseInt(uploadDateMatcher[1], 10)
+      // Month starts from 0
+      const month = parseInt(uploadDateMatcher[2], 10) - 1
+      const day = parseInt(uploadDateMatcher[3], 10)
+
+      originallyPublishedAt.setFullYear(year, month, day)
+    }
+
+    return originallyPublishedAt
+  }
+
+  private buildVideoInfo (obj: any): YoutubeDLInfo {
+    return {
+      name: this.titleTruncation(obj.title || obj.fulltitle),
+      description: this.descriptionTruncation(obj.description),
+      category: this.getCategory(obj.categories),
+      licence: this.getLicence(obj.license),
+      language: this.getLanguage(obj.language),
+      nsfw: this.isNSFW(obj),
+      tags: this.getTags(obj.tags),
+      thumbnailUrl: obj.thumbnail || undefined,
+      urls: this.buildAvailableUrl(obj),
+      originallyPublishedAtWithoutTime: this.buildOriginallyPublishedAt(obj),
+      ext: obj.ext,
+      webpageUrl: obj.webpage_url,
+
+      chapters: isArray(obj.chapters)
+        ? obj.chapters.map((c: { start_time: number, title: string }) => {
+          return {
+            timecode: c.start_time,
+            title: c.title.slice(0, CONSTRAINTS_FIELDS.VIDEO_CHAPTERS.TITLE.max)
+          }
+        })
+        : []
+    }
+  }
+
+  private buildAvailableUrl (obj: any) {
+    const urls: string[] = []
+
+    if (obj.url) urls.push(obj.url)
+    if (obj.urls) {
+      if (Array.isArray(obj.urls)) urls.push(...obj.urls)
+      else urls.push(obj.urls)
+    }
+
+    const formats = Array.isArray(obj.formats)
+      ? obj.formats
+      : []
+
+    for (const format of formats) {
+      if (!format.url) continue
+
+      urls.push(format.url)
+    }
+
+    const thumbnails = Array.isArray(obj.thumbnails)
+      ? obj.thumbnails
+      : []
+
+    for (const thumbnail of thumbnails) {
+      if (!thumbnail.url) continue
+
+      urls.push(thumbnail.url)
+    }
+
+    if (obj.thumbnail) urls.push(obj.thumbnail)
+
+    for (const subtitleKey of Object.keys(obj.subtitles || {})) {
+      const subtitles = obj.subtitles[subtitleKey]
+      if (!Array.isArray(subtitles)) continue
+
+      for (const subtitle of subtitles) {
+        if (!subtitle.url) continue
+
+        urls.push(subtitle.url)
+      }
+    }
+
+    return urls.filter(u => u && isUrlValid(u))
+  }
+
+  private titleTruncation (title: string) {
+    return peertubeTruncate(title, {
+      length: CONSTRAINTS_FIELDS.VIDEOS.NAME.max,
+      separator: /,? +/,
+      omission: ' […]'
+    })
+  }
+
+  private descriptionTruncation (description: string) {
+    if (!description || description.length < CONSTRAINTS_FIELDS.VIDEOS.DESCRIPTION.min) return undefined
+
+    return peertubeTruncate(description, {
+      length: CONSTRAINTS_FIELDS.VIDEOS.DESCRIPTION.max,
+      separator: /,? +/,
+      omission: ' […]'
+    })
+  }
+
+  private isNSFW (info: any) {
+    return info?.age_limit >= 16
+  }
+
+  private getTags (tags: string[]) {
+    if (Array.isArray(tags) === false) return []
+
+    return tags
+      .filter(t => t.length < CONSTRAINTS_FIELDS.VIDEOS.TAG.max && t.length > CONSTRAINTS_FIELDS.VIDEOS.TAG.min)
+      .map(t => t.normalize())
+      .slice(0, 5)
+  }
+
+  private getLicence (licence: string) {
+    if (!licence) return undefined
+
+    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
+  }
+
+  private getCategory (categories: string[]) {
+    if (!categories) return undefined
+
+    const categoryString = categories[0]
+    if (!categoryString || typeof categoryString !== 'string') return undefined
+
+    if (categoryString === 'News & Politics') return 11
+
+    for (const key of Object.keys(VIDEO_CATEGORIES)) {
+      const category = VIDEO_CATEGORIES[key]
+      if (categoryString.toLowerCase() === category.toLowerCase()) return parseInt(key, 10)
+    }
+
+    return undefined
+  }
+
+  private getLanguage (language: string) {
+    return VIDEO_LANGUAGES[language] ? language : undefined
+  }
+}

server/core/helpers/youtube-dl/youtube-dl-wrapper.ts

@@ -0,0 +1,248 @@
+import { VideoResolutionType } from '@peertube/peertube-models'
+import { CONFIG } from '@server/initializers/config.js'
+import { ExecaError } from 'execa'
+import { move, pathExists, remove } from 'fs-extra/esm'
+import { readdir } from 'fs/promises'
+import { dirname, join } from 'path'
+import { inspect } from 'util'
+import { isVideoFileExtnameValid } from '../custom-validators/videos.js'
+import { t } from '../i18n.js'
+import { logger, loggerTagsFactory } from '../logger.js'
+import { generateVideoImportTmpPath } from '../utils.js'
+import { YoutubeDLCLI } from './youtube-dl-cli.js'
+import { YoutubeDLInfo, YoutubeDLInfoBuilder } from './youtube-dl-info-builder.js'
+
+const lTags = loggerTagsFactory('youtube-dl')
+
+export const YoutubeDlImportErrorCode = {
+  FETCH_ERROR: 0,
+  NOT_ONLY_UNICAST_URL: 1,
+  SKIP_PUBLICATION_DATE: 2,
+  IS_LIVE: 3
+}
+
+export type YoutubeDlImportErrorCodeType = typeof YoutubeDlImportErrorCode[keyof typeof YoutubeDlImportErrorCode]
+
+export class YoutubeDlImportError extends Error {
+  static fromError (options: {
+    err: Error
+    code: YoutubeDlImportErrorCodeType
+    message?: string
+  }) {
+    const { err, code, message } = options
+
+    const ytDlErr = new this({ message: message ?? err.message, code })
+    ytDlErr.cause = err
+
+    return ytDlErr
+  }
+
+  code: YoutubeDlImportErrorCodeType
+
+  constructor ({ message, code }) {
+    super(message)
+
+    this.code = code
+  }
+
+  isUnavailableVideoError () {
+    const stderr = this.getStderr()
+
+    if (stderr.includes('Video unavailable') || stderr.includes(' 429 ')) {
+      return true
+    }
+
+    return false
+  }
+
+  isRateLimitError () {
+    const stderr = this.getStderr()
+
+    if (stderr.includes('Sign in to confirm you’re not a bot')) {
+      return true
+    }
+
+    return false
+  }
+
+  private getStderr () {
+    const stderr = (this.cause as ExecaError)?.stderr
+
+    if (typeof stderr === 'string') return stderr
+
+    return ''
+  }
+}
+
+export type YoutubeDLSubs = {
+  language: string
+  filename: string
+  path: string
+}[]
+
+const processOptions = {
+  maxBuffer: 1024 * 1024 * 30 // 30MB
+}
+
+export class YoutubeDLWrapper {
+  constructor (
+    private readonly url: string,
+    private readonly enabledResolutions: VideoResolutionType[],
+    private readonly useBestFormat: boolean
+  ) {
+  }
+
+  async getInfoForDownload (options: {
+    userLanguage: string
+    youtubeDLArgs?: string[]
+  }): Promise<YoutubeDLInfo> {
+    const { userLanguage, youtubeDLArgs = [] } = options
+
+    const youtubeDL = await YoutubeDLCLI.safeGet()
+
+    try {
+      const info = await youtubeDL.getInfo({
+        url: this.url,
+        format: YoutubeDLCLI.getYoutubeDLVideoFormat(this.enabledResolutions, this.useBestFormat),
+        additionalYoutubeDLArgs: youtubeDLArgs,
+        processOptions
+      })
+
+      if (!info) {
+        throw new YoutubeDlImportError({
+          message: t(`Cannot fetch information from import for URL {targetUrl}`, userLanguage, { targetUrl: this.url }),
+          code: YoutubeDlImportErrorCode.FETCH_ERROR
+        })
+      }
+
+      if (info.is_live === true || [ 'is_live', 'post_live', 'is_upcoming' ].includes(info.live_status)) {
+        throw new YoutubeDlImportError({
+          message: t('Cannot download a live streaming for URL {targetUrl}', userLanguage, { targetUrl: this.url }),
+          code: YoutubeDlImportErrorCode.IS_LIVE
+        })
+      }
+
+      const infoBuilder = new YoutubeDLInfoBuilder(info)
+
+      return infoBuilder.getInfo()
+    } catch (err) {
+      throw YoutubeDlImportError.fromError({
+        err,
+        message: t(`Cannot get info from {targetUrl}`, userLanguage, { targetUrl: this.url }),
+        code: YoutubeDlImportErrorCode.FETCH_ERROR
+      })
+    }
+  }
+
+  async getInfoForListImport (options: {
+    userLanguage: string
+    latestVideosCount?: number
+  }) {
+    const { userLanguage } = options
+
+    const youtubeDL = await YoutubeDLCLI.safeGet()
+
+    const list = await youtubeDL.getListInfo({
+      url: this.url,
+      latestVideosCount: options.latestVideosCount,
+      processOptions
+    })
+
+    if (!Array.isArray(list)) {
+      logger.debug(`List info from youtube-dl is not an array for ${this.url}.`, { info: inspect(list), ...lTags() })
+
+      throw new YoutubeDlImportError({
+        message: t(`YoutubeDL could not get list info from ${this.url}: ${inspect(list)}`, userLanguage, { targetUrl: this.url }),
+        code: YoutubeDlImportErrorCode.FETCH_ERROR
+      })
+    }
+
+    return list.map(info => info.webpage_url)
+  }
+
+  async getSubtitles (): Promise<YoutubeDLSubs> {
+    const cwd = CONFIG.STORAGE.TMP_DIR
+
+    const youtubeDL = await YoutubeDLCLI.safeGet()
+
+    const files = await youtubeDL.getSubs({ url: this.url, format: 'vtt', processOptions: { cwd } })
+    if (!files) return []
+
+    logger.debug('Get subtitles from youtube dl.', { url: this.url, files, ...lTags() })
+
+    const subtitles = files.reduce((acc, filename) => {
+      const matched = filename.match(/\.([a-z]{2})(-[a-z]+)?\.(vtt|ttml)/i)
+      if (!matched?.[1]) return acc
+
+      return [
+        ...acc,
+        {
+          language: matched[1],
+          path: join(cwd, filename),
+          filename
+        }
+      ]
+    }, [])
+
+    return subtitles
+  }
+
+  async downloadVideo (fileExt: string, timeout: number): Promise<string> {
+    // Leave empty the extension, youtube-dl will add it
+    const pathWithoutExtension = generateVideoImportTmpPath(this.url, '')
+
+    logger.info('Importing youtubeDL video %s to %s', this.url, pathWithoutExtension, lTags())
+
+    const youtubeDL = await YoutubeDLCLI.safeGet()
+
+    try {
+      await youtubeDL.download({
+        url: this.url,
+        format: YoutubeDLCLI.getYoutubeDLVideoFormat(this.enabledResolutions, this.useBestFormat),
+        output: pathWithoutExtension,
+        timeout,
+        processOptions
+      })
+
+      // If youtube-dl did not guess an extension for our file, just use .mp4 as default
+      if (await pathExists(pathWithoutExtension)) {
+        await move(pathWithoutExtension, pathWithoutExtension + '.mp4')
+      }
+
+      const path = await this.guessVideoPathWithExtension(pathWithoutExtension, fileExt)
+      if (!path) {
+        const directoryContent = await readdir(dirname(pathWithoutExtension))
+
+        throw new Error(`Cannot guess path of ${pathWithoutExtension}. Directory content: ${directoryContent.join(', ')}`)
+      }
+
+      return path
+    } catch (err) {
+      this.guessVideoPathWithExtension(pathWithoutExtension, fileExt)
+        .then(path => {
+          logger.debug('Error in youtube-dl import, deleting file if exists.', { err, pathToDelete: path, ...lTags() })
+
+          if (path) return remove(path)
+        })
+        .catch(innerErr => logger.error('Cannot remove file in youtubeDL error.', { innerErr, ...lTags() }))
+
+      throw err
+    }
+  }
+
+  private async guessVideoPathWithExtension (tmpPath: string, sourceExt: string) {
+    if (!isVideoFileExtnameValid(sourceExt)) {
+      throw new Error('Invalid video extension ' + sourceExt)
+    }
+
+    const extensions = [ sourceExt, '.mp4', '.mkv', '.webm' ]
+
+    for (const extension of extensions) {
+      const path = tmpPath + extension
+
+      if (await pathExists(path)) return path
+    }
+
+    return undefined
+  }
+}