Yt-dlp

* Allow specifying path in `--external-downloader`
* Add option `--sleep-requests` to sleep b/w requests
* Add option `--extractor-retries` to retry on known extractor errors
* Extract comments only when needed
* `--get-comments` doesn't imply `--write-info-json` if `-J`, `-j` or `--print-json` are used
* Fix `get_executable_path` by [shirt](https://github.com/shirt-dev)
* [youtube] Retry on more known errors than just HTTP-5xx
* [youtube] Fix inconsistent `webpage_url`
* [tennistv] Fix format sorting
* [bilibiliaudio] Recognize the file as audio-only
* [hrfensehen] Fix wrong import
* [viki] Fix viki play pass authentication by [RobinD42](https://github.com/RobinD42)
* [readthedocs] Improvements by [shirt](https://github.com/shirt-dev)
* [hls] Fix bug with m3u8 format extraction
* [hls] Enable `--hls-use-mpegts` by default when downloading live-streams
* [embedthumbnail] Fix bug with deleting original thumbnail
* [build] Fix completion paths, zsh pip completion install by [hseg](https://github.com/hseg)
* [ci] Disable download tests unless specifically invoked
* Cleanup some code and fix typos

* Moved project to an organization [yt-dlp](https://github.com/yt-dlp)
* **Completely changed project name to yt-dlp** by [Pccode66](https://github.com/Pccode66) and [pukkandan](https://github.com/pukkandan)
* Also, `youtube-dlc` config files are no longer loaded
* Merge youtube-dl: Upto [commit/4460329](https://github.com/ytdl-org/youtube-dl/commit/44603290e5002153f3ebad6230cc73aef42cc2cd) (except tmz, gedi)
* [Readthedocs](https://yt-dlp.readthedocs.io) support by [shirt](https://github.com/shirt-dev)
* [youtube] Show if video was a live stream in info (`was_live`)
* [Zee5] Add new extractor by [Ashish0804](https://github.com/Ashish0804) and [pukkandan](https://github.com/pukkandan)
* [jwplatform] Add support for `hyland.com`
* [tennistv] Fix extractor
* [hls] Support media initialization by [shirt](https://github.com/shirt-dev)
* [hls] Added options `--hls-split-discontinuity` to better support media discontinuity by [shirt](https://github.com/shirt-dev)
* [ffmpeg] Allow passing custom arguments before -i using `--ppa "ffmpeg_i1:ARGS"` syntax
* Fix `--windows-filenames` removing `/` from UNIX paths
* [hls] Show warning if pycryptodome is not found
* [docs] Improvements
* Fix documentation of `Extractor Options`
* Document `all` in format selection
* Document `playable_in_embed` in output templates

* Merge youtube-dl: Upto [commit/cf2dbec](https://github.com/ytdl-org/youtube-dl/commit/cf2dbec6301177a1fddf72862de05fa912d9869d) (except kakao)
* [viki] Fix extractor
* [niconico] Extract `channel` and `channel_id` by [kurumigi](https://github.com/kurumigi)
* [youtube] Multiple page support for hashtag URLs
* [youtube] Add more invidious instances
* [youtube] Fix comment extraction when comment text is empty
* Option `--windows-filenames` to force use of windows compatible filenames
* [ExtractAudio] Bugfix
* Don't raise `parser.error` when exiting for update
* [MoveFiles] Fix for when merger can't run
* Changed `--trim-file-name` to `--trim-filenames` to be similar to related options
* Format Sort improvements:
* Prefer `vp9.2` more than other `vp9` codecs
* Remove forced priority of `quality`
* Remove unnecessary `field_preference` and misuse of `preference` from extractors
* Build improvements:
* Fix hash output by [shirt](https://github.com/shirt-dev)
* Lock Python package versions for x86 and use `wheels` by [shirt](https://github.com/shirt-dev)
* Exclude `vcruntime140.dll` from UPX by [jbruchon](https://github.com/jbruchon)
* Set version number based on UTC time, not local time
* Publish on PyPi only if token is set
* [docs] Better document `--prefer-free-formats` and add `--no-prefer-free-format`

* Merge youtube-dl: Upto [2021.02.10](https://github.com/ytdl-org/youtube-dl/releases/tag/2021.02.10) (except archive.org)
* [niconico] Improved extraction and support encrypted/SMILE movies by [kurumigi](https://github.com/kurumigi), [tsukumijima](https://github.com/tsukumijima), [bbepis](https://github.com/bbepis), [pukkandan](https://github.com/pukkandan)
* Fix HLS AES-128 with multiple keys in external downloaders by [shirt](https://github.com/shirt-dev)
* [youtube_live_chat] Fix by using POST API by [siikamiika](https://github.com/siikamiika)
* [rumble] Add support for video page
* Option `--allow-unplayable-formats` to allow downloading unplayable video formats
* [ExtractAudio] Don't re-encode when file is already in a common audio format
* [youtube] Fix search continuations
* [youtube] Fix for new accounts
* Improve build/updater: by [pukkandan](https://github.com/pukkandan) and [shirt](https://github.com/shirt-dev)
* Fix SHA256 calculation in build and implement hash checking for updater
* Exit immediately in windows once the update process starts
* Fix updater for `x86.exe`
* Updater looks for both `yt-dlp` and `youtube-dlc` in releases for future-proofing
* Change optional dependency to `pycryptodome`
* Fix issue with unicode filenames in aria2c by [shirt](https://github.com/shirt-dev)
* Fix `allow_playlist_files` not being correctly passed through
* Fix for empty HTTP head requests by [shirt](https://github.com/shirt-dev)
* Fix `get_executable_path` in UNIX
* [sponskrub] Print ffmpeg output and errors to terminal
* `__real_download` should be false when ffmpeg unavailable and no download
* Show `exe`/`zip`/`source` and 32/64bit in verbose message

* **aria2c support for DASH/HLS**: by [shirt](https://github.com/shirt-dev)
* **Implement Updater** (`-U`) by [shirt](https://github.com/shirt-dev)
* [youtube] Fix comment extraction
* [youtube_live_chat] Improve extraction
* [youtube] Fix for channel URLs sometimes not downloading all pages
* [aria2c] Changed default arguments to `--console-log-level=warn --summary-interval=0 --file-allocation=none -x16 -j16 -s16`
* Add fallback for thumbnails
* [embedthumbnail] Keep original thumbnail after conversion if write_thumbnail given
* [embedsubtitle] Keep original subtitle after conversion if write_subtitles given
* [pyinst.py] Move back to root dir
* [youtube] Simplified renderer parsing and bugfixes
* [movefiles] Fix compatibility with python2
* [remuxvideo] Fix validation of conditional remux
* [sponskrub] Don't raise error when the video does not exist
* [docs] Crypto is an optional dependency

* Merge youtube-dl: Upto [2021.02.04.1](https://github.com/ytdl-org/youtube-dl/releases/tag/2021.02.04.1)
* **Date/time formatting in output template:**
* You can use [`strftime`](https://docs.python.org/3/library/datetime.html#strftime-and-strptime-format-codes) to format date/time fields. Example: `%(upload_date>%Y-%m-%d)s`
* **Multiple output templates:**
* Separate output templates can be given for the different metadata files by using `-o TYPE:TEMPLATE`
* The allowed types are: `subtitle|thumbnail|description|annotation|infojson|pl_description|pl_infojson`
* [youtube] More metadata extraction for channel/playlist URLs (channel, uploader, thumbnail, tags)
* New option `--no-write-playlist-metafiles` to prevent writing playlist metadata files
* [audius] Fix extractor
* [youtube_live_chat] Fix `parse_yt_initial_data` and add `fragment_retries`
* [postprocessor] Raise errors correctly
* [metadatafromtitle] Fix bug when extracting data from numeric fields
* Fix issue with overwriting files
* Fix "Default format spec" appearing in quiet mode
* [FormatSort] Allow user to prefer av01 over vp9 (The default is still vp9)
* [FormatSort] fix bug where `quality` had more priority than `hasvid`
* [pyinst] Automatically detect Python architecture and working directory
* Strip out internal fields such as `_filename` from infojson