Youtube-dl

Extractors
* [youtube] Extend JS player signature function name regular expressions
(18890, 18891, 18893)

Core
+ [test/helper] Add support for maxcount and count collection len checkers
* [downloader/hls] Fix uplynk ad skipping (18824)
* [postprocessor/ffmpeg] Improve ffmpeg version parsing (18813)

Extractors
* [youtube] Skip unsupported adaptive stream type (18804)
+ [youtube] Extract DASH formats from player response (18804)
* [funimation] Fix extraction (14089)
* [skylinewebcams] Fix extraction (18853)
+ [curiositystream] Add support for non app URLs
+ [bitchute] Check formats (18833)
* [wistia] Extend URL regular expression (18823)
+ [playplustv] Add support for playplus.com (18789)

Core
* [extractor/common] Use episode name as title in _json_ld
+ [extractor/common] Add support for movies in _json_ld
* [postprocessor/ffmpeg] Embed subtitles with non-standard language codes
(18765)
+ [utils] Add language codes replaced in 1989 revision of ISO 639
to ISO639Utils (18765)

Extractors
* [youtube] Extract live HLS URL from player response (18799)
+ [outsidetv] Add support for outsidetv.com (18774)
* [jwplatform] Use JW Platform Delivery API V2 and add support for more URLs
+ [fox] Add support National Geographic (17985, 15333, 14698)
+ [playplustv] Add support for playplus.tv (18789)
* [globo] Set GLBID cookie manually (17346)
+ [gaia] Add support for gaia.com (14605)
* [youporn] Fix title and description extraction (18748)
+ [hungama] Add support for hungama.com (17402, 18771)
* [dtube] Fix extraction (18741)
* [tvnow] Fix and rework extractors and prepare for a switch to the new API
(17245, 18499)
* [carambatv:page] Fix extraction (18739)

Extractors
* [discovery] Use geo verification headers (17838)
+ [packtpub] Add support for subscription.packtpub.com (18718)
* [yourporn] Fix extraction (18583)
+ [acast:channel] Add support for play.acast.com (18587)
+ [extractors] Add missing age limits (18621)
+ [rmcdecouverte] Add support for live stream
* [rmcdecouverte] Bypass geo restriction
* [rmcdecouverte] Update URL regular expression (18595, 18697)
* [manyvids] Fix extraction (18604, 18614)
* [bitchute] Fix extraction (18567)

Extractors
+ [bbc] Add support for another embed pattern (18643)
+ [npo:live] Add support for npostart.nl (18644)
* [beeg] Fix extraction (18610, 18626)
* [youtube] Unescape HTML for series (18641)
+ [youtube] Extract more format metadata
* [youtube] Detect DRM protected videos (1774)
* [youtube] Relax HTML5 player regular expressions (18465, 18466)
* [youtube] Extend HTML5 player regular expression (17516)
+ [liveleak] Add support for another embed type and restore original
format extraction
+ [crackle] Extract ISM and HTTP formats
+ [twitter] Pass Referer with card request (18579)
* [mediasite] Extend URL regular expression (18558)
+ [lecturio] Add support for lecturio.de (18562)
+ [discovery] Add support for Scripps Networks watch domains (17947)

Extractors
* [ard:beta] Improve geo restricted videos extraction
* [ard:beta] Fix subtitles extraction
* [ard:beta] Improve extraction robustness
* [ard:beta] Relax URL regular expression (18441)
* [acast] Add support for embed.acast.com and play.acast.com (18483)
* [iprima] Relax URL regular expression (18515, 18540)
* [vrv] Fix initial state extraction (18553)
* [youtube] Fix mark watched (18546)
+ [safari] Add support for learning.oreilly.com (18510)
* [youtube] Fix multifeed extraction (18531)
* [lecturio] Improve subtitles extraction (18488)
* [uol] Fix format URL extraction (18480)
+ [ard:mediathek] Add support for classic.ardmediathek.de (18473)