Log Message:
youtube-dl: Update to 20200616

Changes:
20200616
--------
Extractors
* [youtube] Fix uploader id and uploader URL extraction
* [youtube] Improve view count extraction
* [youtube] Fix upload date extraction (#25677)
* [youtube] Fix thumbnails extraction (#25676)
* [youtube] Fix playlist and feed extraction (#25675)
+ [facebook] Add support for single-video ID links
+ [youtube] Extract chapters from JSON (#24819)
+ [kaltura] Add support for multiple embeds on a webpage (#25523)