Log Message:
youtube-dl: Update to 20210116

Changes:
version 2021.01.16

Core
* [YoutubeDL] Protect from infinite recursion due to recursively nested
  playlists (#27833)
* [YoutubeDL] Ignore failure to create existing directory (#27811)
* [YoutubeDL] Raise syntax error for format selection expressions with multiple
  + operators (#27803)

Extractors
+ [animeondemand] Add support for lazy playlist extraction (#27829)
* [youporn] Restrict fallback download URL (#27822)
* [youporn] Improve height and tbr extraction (#20425, #23659)
* [youporn] Fix extraction (#27822)
+ [twitter] Add support for unified cards (#27826)
+ [twitch] Add Authorization header with OAuth token for GraphQL requests
  (#27790)
* [mixcloud:playlist:base] Extract video id in flat playlist mode (#27787)
* [cspan] Improve info extraction (#27791)
* [adn] Improve info extraction
* [adn] Fix extraction (#26963, #27732)
* [youtube:search] Extract from all sections (#27604)
* [youtube:search] fix viewcount and try to extract all video sections (#27604)
* [twitch] Improve login error extraction
* [twitch] Fix authentication (#27743)
* [3qsdn] Improve extraction (#21058)
* [peertube] Extract formats from streamingPlaylists (#26002, #27586, #27728)
* [khanacademy] Fix extraction (#2887, #26803)
* [spike] Update Paramount Network feed URL (#27715)