Closes #1942 #1976 #2020 #2058 #1984

Closes #1805, closes #1800

Closes #792, #963

Authored by: sulyi

Closes #911 
Authored by: Ashish0804

When using 
```py
os.remove(encodeFilename(filename))
os.rename(encodeFilename(temp_filename), encodeFilename(filename))
```
the `os.remove` need not be atomic and so can be executed arbitrarily compared to the immediately following rename call. It is better to use `os.replace` instead

Authored by: paulwrubel

`nosetests` is no longer being maintained : https://github.com/nose-devs/nose/issues/1099
and will stop working in py 3.10 as can be seen in #480

and fix some typos
Closes #538

Closes #352
The approach in [1] is faulty as can be seen in the test cases
1. https://github.com/ytdl-org/youtube-dl/commit/bff857a8af696e701482208617bf0b7564951326

* Option `--concurrent-fragments` (`-N`) to set the number of threads

Related: #165

Known issues:
* When receiving Ctrl+C, the process will exit only after finishing the currently downloading fragments
* The download progress shows the speed of only one thread

Authored by shirt-dev

* Autogenerate `AUTHORS`
* Fix `setup.py` using wrong completion files
* Complete `ChangeLog` -> `Changelog.md` rename
* Make `make tar` respect DESTDIR
* Remove `bin/` `yt-dlp` and `docs/` from tar and sdist
* Make `pypi-files` build all files needed for `python setup.py`
* Add `completions` alias
* Add `devscripts/` and `supportedsites.md` to pip sdist
* Remove `man` target
* Remove `README.txt` from sdist
* Make `clean` more granular
* Move aliases to top

Authored by: hseg <gesh@gesh.uni.cx>

* `--get-comments` doesn't imply `--write-info-json` if `-J`, `-j` or `--print-json` are used
* Don't pass `config_location` to `YoutubeDL` (it is unused)
* [bilibiliaudio] Recognize the file as audio-only
* Update gitignore
* Fix typos

* All modules and binary names are changed
* All documentation references changed
* yt-dlp no longer loads youtube-dlc config files
* All URLs changed to point to organization account

Co-authored-by: Pccode66
Co-authored-by: pukkandan

:ci skip dl

:ci skip dl

:ci skip dl

Extractor plugins are loaded from <root-dir>/ytdlp_plugins/extractor/__init__.py

Inspired by https://github.com/un-def/dl-plus

:ci skip dl

Inspired by https://github.com/ytdl-org/youtube-dl/pull/27592

* Extract m3u8 parsing to separate method
* Improve rendition groups extraction
* Build stream name according stream GROUP-ID
* Ignore reference to AUDIO group without URI when stream has no CODECS
+ Add test coverage for parsing m3u8 from #11507, #11995, #12211 and twitch vod

Some videos on NicoNico are swf

ape is another audio codec seen in kuwo. See
https://en.wikipedia.org/wiki/Monkey's_Audio