Yt-dlp

* **Youtube improvements**:
* Support youtube music `MP`, `VL` and `browse` pages
* Extract more formats for youtube music by [craftingmod](https://github.com/craftingmod), [coletdjnz](https://github.com/coletdjnz) and [pukkandan](https://github.com/pukkandan)
* Extract multiple subtitles in same language by [pukkandan](https://github.com/pukkandan) and [tpikonen](https://github.com/tpikonen)
* Redirect channels that doesn't have a `videos` tab to their `UU` playlists
* Support in-channel search
* Sort audio-only formats correctly
* Always extract `maxresdefault` thumbnail
* Extract audio language
* Add subtitle language names by [nixxo](https://github.com/nixxo) and [tpikonen](https://github.com/tpikonen)
* Show alerts only from the final webpage
* Add `html5=1` param to `get_video_info` page requests by [coletdjnz](https://github.com/coletdjnz)
* Better message when login required
* **Add option `--print`**: to print any field/template
* Makes redundant: `--get-description`, `--get-duration`, `--get-filename`, `--get-format`, `--get-id`, `--get-thumbnail`, `--get-title`, `--get-url`
* Field `additional_urls` to download additional videos from metadata using [`--parse-metadata`](https://github.com/yt-dlp/yt-dlp#modifying-metadata)
* Merge youtube-dl: Upto [commit/dfbbe29](https://github.com/ytdl-org/youtube-dl/commit/dfbbe2902fc67f0f93ee47a8077c148055c67a9b)
* Write thumbnail of playlist and add `pl_thumbnail` outtmpl key
* [embedthumbnail] Add `flac` support and refactor `mutagen` code by [pukkandan](https://github.com/pukkandan) and [tripulse](https://github.com/tripulse)
* [audius:artist] Add extractor by [king-millez](https://github.com/king-millez)
* [parlview] Add extractor by [king-millez](https://github.com/king-millez)
* [tenplay] Fix extractor by [king-millez](https://github.com/king-millez)
* [rmcdecouverte] Generalize `_VALID_URL`
* Add compat-option `no-attach-infojson`
* Add field `name` for subtitles
* Ensure `post_extract` and `pre_process` only run once
* Fix `--check-formats` when there is network error
* Standardize `write_debug` and `get_param`
* [options] Alias `--write-comments`, `--no-write-comments`
* [options] Refactor callbacks
* [test:download] Only extract enough videos for `playlist_mincount`
* [extractor] bugfix for when `compat_opts` is not given
* [build] Fix x86 build by [shirt](https://github.com/shirt-dev)
* [cleanup] code formatting, youtube tests and readme

* **Deprecate support for Python versions < 3.6**
* **Subtitle extraction from manifests** by [fstirlitz](https://github.com/fstirlitz). See [be6202f](https://github.com/yt-dlp/yt-dlp/commit/be6202f12b97858b9d716e608394b51065d0419f) for details
* **Improve output template:**
* Allow slicing lists/strings using `field.start:end:step`
* A field can also be used as offset like `field1+num+field2`
* A default value can be given using `field|default`
* Prevent invalid fields from causing errors
* **Merge youtube-dl**: Upto [commit/a726009](https://github.com/ytdl-org/youtube-dl/commit/a7260099873acc6dc7d76cafad2f6b139087afd0)
* **Remove options** `-l`, `-t`, `-A` completely and disable `--auto-number`, `--title`, `--literal`, `--id`
* [Plugins] Prioritize plugins over standard extractors and prevent plugins from overwriting the standard extractor classes
* [downloader] Fix `quiet` and `to_stderr`
* [fragment] Ensure the file is closed on error
* [fragment] Make sure first segment is not skipped
* [aria2c] Fix whitespace being stripped off
* [embedthumbnail] Fix bug where jpeg thumbnails were converted again
* [FormatSort] Fix for when some formats have quality and others don't
* [utils] Add `network_exceptions`
* [utils] Escape URL while sanitizing
* [ukcolumn] Add Extractor
* [whowatch] Add extractor by [nao20010128nao](https://github.com/nao20010128nao)
* [CBS] Improve `_VALID_URL` to support movies
* [crackle] Improve extraction
* [curiositystream] Fix collections
* [francetvinfo] Improve video id extraction
* [generic] Respect the encoding in manifest
* [limelight] Obey `allow_unplayable_formats`
* [mediasite] Generalize URL pattern by [fstirlitz](https://github.com/fstirlitz)
* [mxplayer] Add MxplayerShowIE by [Ashish0804](https://github.com/Ashish0804)
* [nebula] Move to nebula.app by [Lamieur](https://github.com/Lamieur)
* [niconico] Fix HLS formats by [CXwudi](https://github.com/CXwudi), [tsukumijima](https://github.com/tsukumijima), [nao20010128nao](https://github.com/nao20010128nao) and [pukkandan](https://github.com/pukkandan)
* [niconico] Fix title and thumbnail extraction by [CXwudi](https://github.com/CXwudi)
* [plutotv] Extract subtitles from manifests
* [plutotv] Fix format extraction for some urls
* [rmcdecouverte] Improve `_VALID_URL`
* [sonyliv] Fix `title` and `series` extraction by [Ashish0804](https://github.com/Ashish0804)
* [tubi] Raise "no video formats" error when video url is empty
* [youtube:tab] Detect playlists inside community posts
* [youtube] Add `oembed` to reserved names
* [zee5] Fix extraction for some URLs by [Hadi0609](https://github.com/Hadi0609)
* [zee5] Fix py2 compatibility
* Fix `playlist_index` and add `playlist_autonumber`. See [302](https://github.com/yt-dlp/yt-dlp/issues/302) for details
* Add experimental option `--check-formats` to test the URLs before format selection
* Option `--compat-options` to revert [some of yt-dlp's changes](https://github.com/yt-dlp/yt-dlp#differences-in-default-behavior)
* Deprecates `--list-formats-as-table`, `--list-formats-old`
* Fix number of digits in `%(playlist_index)s`
* Fix case sensitivity of format selector
* Revert "[core] be able to hand over id and title using url_result"
* Do not strip out whitespaces in `-o` and `-P`
* Fix `preload_download_archive` writing verbose message to `stdout`
* Move option warnings to `YoutubeDL`so that they obey `--no-warnings` and can output colors
* Py2 compatibility for `FileNotFoundError`

* **Improve output template:**
* Objects can be traversed like `%(field.key1.key2)s`
* An offset can be added to numeric fields as `%(field+N)s`
* Deprecates `--autonumber-start`
* **Improve `--sub-langs`:**
* Treat `--sub-langs` entries as regex
* `all` can be used to refer to all the subtitles
* language codes can be prefixed with `-` to exclude it
* Deprecates `--all-subs`
* Add option `--ignore-no-formats-error` to ignore the "no video format" and similar errors
* Add option `--skip-playlist-after-errors` to skip the rest of a playlist after a given number of errors are encountered
* Merge youtube-dl: Upto [commit/7e8b3f9](https://github.com/ytdl-org/youtube-dl/commit/7e8b3f9439ebefb3a3a4e5da9c0bd2b595976438)
* [downloader] Fix bug in downloader selection
* [BilibiliChannel] Fix pagination by [nao20010128nao](https://github.com/nao20010128nao) and [pukkandan](https://github.com/pukkandan)
* [rai] Add support for http formats by [nixxo](https://github.com/nixxo)
* [TubiTv] Add TubiTvShowIE by [Ashish0804](https://github.com/Ashish0804)
* [twitcasting] Fix extractor
* [viu:ott] Fix extractor and support series by [lkho](https://github.com/lkho) and [pukkandan](https://github.com/pukkandan)
* [youtube:tab] Show unavailable videos in playlists by [coletdjnz](https://github.com/coletdjnz)
* [youtube:tab] Reload with unavailable videos for all playlists
* [youtube] Ignore invalid stretch ratio
* [youtube] Improve channel syncid extraction to support ytcfg by [coletdjnz](https://github.com/coletdjnz)
* [youtube] Standardize API calls for tabs, mixes and search by [coletdjnz](https://github.com/coletdjnz)
* [youtube] Bugfix in `_extract_ytcfg`
* [mildom:user:vod] Download only necessary amount of pages
* [mildom] Remove proxy completely by [fstirlitz](https://github.com/fstirlitz)
* [go] Fix `_VALID_URL`
* [MetadataFromField] Improve regex and add tests
* [Exec] Ensure backward compatibility when the command contains `%`
* [extractor] Fix inconsistent use of `report_warning`
* Ensure `mergeall` selects best format when multistreams are disabled
* Improve the yt-dlp.sh script by [fstirlitz](https://github.com/fstirlitz)
* [lazy_extractor] Do not load plugins
* [ci] Disable fail-fast
* [docs] Clarify which deprecated options still work
* [docs] Fix typos

* Add option `--convert-thumbnails` (only jpg currently supported)
* Format selector `mergeall` to download and merge all formats
* Pass any field to `--exec` using similar syntax to output template
* Choose downloader for each protocol using `--downloader PROTO:NAME`
* Alias `--downloader` for `--external-downloader`
* Added `native` as an option for the downloader
* Merge youtube-dl: Upto [commit/4fb25ff](https://github.com/ytdl-org/youtube-dl/commit/4fb25ff5a3be5206bb72e5c4046715b1529fb2c7) (except vimeo)
* [DiscoveryPlusIndia] Add DiscoveryPlusIndiaShowIE by [Ashish0804](https://github.com/Ashish0804)
* [NFHSNetwork] Add extractor by [llacb47](https://github.com/llacb47)
* [nebula] Add extractor (watchnebula.com) by [hheimbuerger](https://github.com/hheimbuerger)
* [nitter] Fix extraction of reply tweets and update instance list by [B0pol](https://github.com/B0pol)
* [nitter] Fix thumbnails by [B0pol](https://github.com/B0pol)
* [youtube] Fix thumbnail URL
* [youtube] Parse API parameters from initial webpage by [coletdjnz](https://github.com/coletdjnz)
* [youtube] Extract comments' approximate timestamp by [coletdjnz](https://github.com/coletdjnz)
* [youtube] Fix alert extraction
* [bilibili] Fix uploader
* [utils] Add `datetime_from_str` and `datetime_add_months` by [coletdjnz](https://github.com/coletdjnz)
* Run some `postprocessors` before actual download
* Improve argument parsing for `-P`, `-o`, `-S`
* Fix some `m3u8` not obeying `--allow-unplayable-formats`
* Fix default of `dynamic_mpd`
* Deprecate `--all-formats`, `--include-ads`, `--hls-prefer-native`, `--hls-prefer-ffmpeg`
* [docs] Improvements

* Merge youtube-dl: Upto [commit/654b4f4](https://github.com/ytdl-org/youtube-dl/commit/654b4f4ff2718f38b3182c1188c5d569c14cc70a)
* Ability to set a specific field in the file's metadata using `--parse-metadata`
* Ability to select n'th best format like `-f bv*.2`
* [DiscoveryPlus] Add discoveryplus.in
* [la7] Add podcasts and podcast playlists by [nixxo](https://github.com/nixxo)
* [mildom] Update extractor with current proxy by [nao20010128nao](https://github.com/nao20010128nao)
* [ard:mediathek] Fix video id extraction
* [generic] Detect Invidious' link element
* [youtube] Show premium state in `availability` by [coletdjnz](https://github.com/coletdjnz)
* [viewsource] Add extractor to handle `view-source:`
* [sponskrub] Run before embedding thumbnail
* [docs] Improve `--parse-metadata` documentation

* Revert [commit/8562218](https://github.com/ytdl-org/youtube-dl/commit/8562218350a79d4709da8593bb0c538aa0824acf)