A description of the various files are in the README

Changelog:

• [youtube] Fix throttling by decrypting n-sig
• Merging extractors from haruhi-dl by selfisekai
  • [extractor] Add _search_nextjs_data
  • [tvp] Fix extractors
  • [tvp] Add TVPStreamIE
  • [wppilot] Add extractors
  • [polskieradio] Add extractors
  • [radiokapital] Add extractors
  • [polsatgo] Add extractor by selfisekai, sdomi
• Separate --check-all-formats from --check-formats
• Approximate filesize from bitrate
• Don't create console in windows_enable_vt_mode
• Fix bug in --load-infojson of playlists
• [minicurses] Add colors to -F and standardize color-printing code
• [outtmpl] Add type link for internet shortcut files
• [outtmpl] Add alternate forms for q and j
• [outtmpl] Do not traverse None
• [fragment] Fix progress display in fragmented downloads
• [downloader/ffmpeg] Fix vtt download with ffmpeg
• [ffmpeg] Detect presence of setts and libavformat version
• [ExtractAudio] Rescale --audio-quality correctly by CrypticSignal, pukkandan
• [ExtractAudio] Use libfdk_aac if available by CrypticSignal
• [FormatSort] eac3 is better than ac3
• [FormatSort] Fix some fields' defaults
• [generic] Detect more json_ld
• [generic] parse jwplayer with only the json URL
• [extractor] Add keyword automatically to SearchIE descriptions
• [extractor] Fix some errors being converted to ExtractorError
• [utils] Add join_nonempty
• [utils] Add jwt_decode_hs256 by Ashish0804
• [utils] Create DownloadCancelled exception
• [utils] Parse vp09 as vp9
• [utils] Sanitize URL when determining protocol
• [test/download] Fallback test to bv
• [docs] Minor documentation improvements
• [cleanup] Improvements to error and debug messages
• [cleanup] Minor fixes and cleanup
• [3speak] Add extractors by Ashish0804
• [AmazonStore] Add extractor by Ashish0804
• [Gab] Add extractor by u-spec-png
• [mediaset] Add playlist support by nixxo
• [MLSScoccer] Add extractor by Ashish0804
• [N1] Add support for nova.rs by u-spec-png
• [PlanetMarathi] Add extractor by Ashish0804
• [RaiplayRadio] Add extractors by frafra
• [roosterteeth] Add series extractor
• [sky] Add SkyNewsStoryIE by ajj8
• [youtube] Fix sorting for some videos
• [youtube] Populate thumbnail with the best "known" thumbnail
• [youtube] Refactor itag processing
• [youtube] Remove unnecessary no-playlist warning
• [youtube:tab] Add Invidious list for playlists/channels by rhendric
• [Bilibili:comments] Fix infinite loop by u-spec-png
• [ceskatelevize] Fix extractor by flashdagger
• [Coub] Fix media format identification by wlritchi
• [crunchyroll] Add extractor-args language and hardsub
• [DiscoveryPlus] Allow language codes in URL
• [imdb] Fix thumbnail by ozburo
• [instagram] Add IOS URL support by u-spec-png
• [instagram] Improve login code by u-spec-png
• [Instagram] Improve metadata extraction by u-spec-png
• [iPrima] Fix extractor by stanoarn
• [itv] Add support for ITV News by ajj8
• [la7] Fix extractor by nixxo
• [linkedin] Don't login multiple times
• [mtv] Fix some videos by Sipherdrakon
• [Newgrounds] Fix description by u-spec-png
• [Nrk] Minor fixes by fractalf
• [Olympics] Fix extractor by u-spec-png
• [piksel] Fix sorting
• [twitter] Do not sort by codec
• [viewlift] Add cookie-based login and series support by Ashish0804, pukkandan
• [vimeo] Detect source extension and misc cleanup by flashdagger
• [vimeo] Fix ondemand videos and direct URLs with hash
• [vk] Fix login and add subtitles by kaz-us
• [VLive] Add upload_date and thumbnail by Ashish0804
• [VRT] Fix login by pgaig
• [Vupload] Fix extractor by u-spec-png
• [wakanim] Add support for MPD manifests by nyuszika7h
• [wakanim] Detect geo-restriction by nyuszika7h
• [ZenYandex] Fix extractor by u-spec-png