Log Message:
youtube-dl: Update to 20210222

Changes:
20210222
--------
Core
+ [postprocessor/embedthumbnail] Recognize atomicparsley binary in lowercase
  (#28112)

Extractors
* [apa] Fix and improve extraction (#27750)
+ [youporn] Extract duration (#28019)
+ [peertube] Add support for canard.tube (#28190)
* [youtube] Fixup m4a_dash formats (#28165)
+ [samplefocus] Add support for samplefocus.com (#27763)
+ [vimeo] Add support for unlisted video source format extraction
* [viki] Improve extraction (#26522, #28203)
    * Extract uploader URL and episode number
    * Report login required error
    + Extract 480p formats
    * Fix API v4 calls
* [ninegag] Unescape title (#28201)
* [youtube] Improve URL regular expression (#28193)
+ [youtube] Add support for redirect.invidious.io (#28193)
+ [dplay] Add support for de.hgtv.com (#28182)
+ [dplay] Add support for discoveryplus.com (#24698)
+ [simplecast] Add support for simplecast.com (#24107)
* [youtube] Fix uploader extraction in flat playlist mode (#28045)
* [yandexmusic:playlist] Request missing tracks in chunks (#27355, #28184)
+ [storyfire] Add support for storyfire.com (#25628, #26349)
+ [zhihu] Add support for zhihu.com (#28177)
* [youtube] Fix controversial videos when authenticated with cookies (#28174)
* [ccma] Fix timestamp parsing in python 2
+ [videopress] Add support for video.wordpress.com
* [kakao] Improve info extraction and detect geo restriction (#26577)
* [xboxclips] Fix extraction (#27151)
* [ard] Improve formats extraction (#28155)
+ [canvas] Add support for dagelijksekost.een.be (#28119)