youtube-dl 2020.12.12

Core

• [YoutubeDL] Improve thumbnail filename deducing (#26010, #27244)

Extractors

• [ruutu] Extract more metadata
• [ruutu] Detect non-free videos (#21154)

• [ruutu] Authenticate format URLs (#21031, #26782)

• [ruutu] Add support for static.nelonenmedia.fi (#25412)
• [ruutu] Extend URL regular expression (#24839)
• [facebook] Add support archived live video URLs (#15859)

• [wdr] Improve overall extraction

• [wdr] Extend subtitles extraction (#22672, #22723)
• [facebook] Add support for videos attached to Relay based story pages
  (#10795)
• [wdr:page] Add support for kinder.wdr.de (#27350)
• [facebook] Add another regular expression for handleServerJS

• [facebook] Fix embed page extraction

• [facebook] Add support for Relay post pages (#26935)
• [facebook] Add support for watch videos (#22795, #27062)
• [facebook] Add support for group posts with multiple videos (#19131)

• [itv] Fix series metadata extraction (#26897)

• [itv] Remove old extraction method (#23177)

• [facebook] Redirect mobile URLs to desktop URLs (#24831, #25624)

• [facebook] Add support for Relay based pages (#26823)

• [facebook] Try to reduce unnecessary tahoe requests

• [facebook] Remove hardcoded Chrome User-Agent (#18974, #25411, #26958,
  #27329)
• [smotri] Remove extractor (#27358)
• [beampro] Remove extractor (#17290, #22871, #23020, #23061, #26099)