Update youtube-dl to 2019.02.08

Changelog:

• Core
  • [utils] Improve JSON-LD regular expression
  • [YoutubeDL] Fallback to ie_key of matching extractor while making download archive id when no explicit ie_key is provided
• Extractors
  • [malltv] Add support for mall.tv
  • [trutv] Fix extraction
  • [toutv] Fix authentication
  • [radiocanada] Switch to the new media requests
  • [teachable] Add support for courses.workitdaily.com
  • [soundcloud:pagedplaylist] Add ie and title to entries
  • [drtuber] Extract duration
  • [soundcloud] Fix paged playlists extraction, add support for albums and update client id
  • [soundcloud] Update client id
  • [drtv] Improve preference
  • [openload] Add support for openload.pw and oload.pw
  • [openload] Add support for oload.info
  • [crackle] Authorize media detail request

Downloaded a youtube video, extracted the audio and converted it to a mp3 and copied it into a folder