Log Message:
youtube-dl: Update to 20201212

Changes:
version 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)

version 2020.12.09

Core
* [extractor/common] Fix inline HTML5 media tags processing (#27345)

Extractors
* [youtube:tab] Improve identity token extraction (#27197)
* [youtube:tab] Make click tracking params on continuation optional
* [youtube:tab] Delegate inline playlists to tab-based playlists (27298)
+ [tubitv] Extract release year (#27317)
* [amcnetworks] Fix free content extraction (#20354)
+ [lbry:channel] Add support for channels (#25584)
+ [lbry] Add support for short and embed URLs
* [lbry] Fix channel metadata extraction
+ [telequebec] Add support for video.telequebec.tv (#27339)
* [telequebec] Fix extraction (#25733, #26883)
+ [youtube:tab] Capture and output alerts (#27340)
* [tvplay:home] Fix extraction (#21153)
* [americastestkitchen] Fix Extraction and add support
  for Cook's Country and Cook's Illustrated (#17234, #27322)
+ [slideslive] Add support for yoda service videos and extract subtitles
  (#27323)

version 2020.12.07

Core
* [extractor/common] Extract timestamp from Last-Modified header
+ [extractor/common] Add support for dl8-* media tags (#27283)
* [extractor/common] Fix media type extraction for HTML5 media tags
  in start/end form

Extractors
* [aenetworks] Fix extraction (#23363, #23390, #26795, #26985)
    * Fix Fastly format extraction
    + Add support for play and watch subdomains
    + Extract series metadata
* [youtube] Improve youtu.be extraction in non-existing playlists (#27324)
+ [generic] Extract RSS video description, timestamp and itunes metadata
  (#27177)
* [nrk] Reduce the number of instalments and episodes requests
* [nrk] Improve extraction
    * Improve format extraction for old akamai formats
    + Add is_live value to entry info dict
    * Request instalments only when available
    * Fix skole extraction
+ [peertube] Extract fps
+ [peertube] Recognize audio-only formats (#27295)

version 2020.12.05

Core
* [extractor/common] Improve Akamai HTTP format extraction
    * Allow m3u8 manifest without an additional audio format
    * Fix extraction for qualities starting with a number

Extractors
* [teachable:course] Improve extraction (#24507, #27286)
* [nrk] Improve error extraction
* [nrktv:series] Improve extraction (#21926)
* [nrktv:season] Improve extraction
* [nrk] Improve format extraction and geo-restriction detection (#24221)
* [pornhub] Handle HTTP errors gracefully (#26414)
* [nrktv] Relax URL regular expression (#27299, #26185)
+ [zdf] Extract webm formats (#26659)
+ [gamespot] Extract DASH and HTTP formats
+ [tver] Add support for tver.jp (#26662, #27284)
+ [pornhub] Add support for pornhub.org (#27276)

version 2020.12.02

Extractors
+ [tva] Add support for qub.ca (#27235)
+ [toggle] Detect DRM protected videos (closes #16479)(closes #20805)
+ [toggle] Add support for new MeWatch URLs (#27256)
* [youtube:tab] Extract channels only from channels tab (#27266)
+ [cspan] Extract info from jwplayer data (#3672, #3734, #10638, #13030,
  #18806, #23148, #24461, #26171, #26800, #27263)
* [cspan] Pass Referer header with format's video URL (#26032, #25729)
* [youtube] Improve age-gated videos extraction (#27259)
+ [mediaset] Add support for movie URLs (#27240)
* [yandexmusic] Refactor
+ [yandexmusic] Add support for artist's tracks and albums (#11887, #22284)
* [yandexmusic:track] Fix extraction (#26449, #26669, #26747, #26748, #26762)