[jove] Add new extractor. Closes #3177
[dfb] Fix f4m manifest URL
[pbs] Extract coveplayerid (Closes #3522)
[pbs] Add frontline video test
[rtlnl] Add extractor for rtlxl.nl (closes #3523)
[mitele] Add extractor for mitele.es
Merge branch 'jove' of https://github.com/naglis/youtube-dl into naglis-jove
[jove] Simplify, extract full description and add test for video that requires subscription
Merge branch 'naglis-jove'
Merge remote-tracking branch 'upstream/master'