youtube-dl 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)