Log Message:
youtube-dl: Update to 20190424

Changes:
version 2019.04.24

Extractors
* [youtube] Fix extraction (#20758, #20759, #20761, #20762, #20764, #20766,
  #20767, #20769, #20771, #20768, #20770)
* [toutv] Fix extraction and extract series info (#20757)
+ [vrv] Add support for movie listings (#19229)
+ [youtube] Print error when no data is available (#20737)
+ [soundcloud] Add support for new rendition and improve extraction (#20699)
+ [ooyala] Add support for geo verification proxy
+ [nrl] Add support for nrl.com (#15991)
+ [vimeo] Extract live archive source format (#19144)
+ [vimeo] Add support for live streams and improve info extraction (#19144)
+ [ntvcojp] Add support for cu.ntv.co.jp
+ [nhk] Extract RTMPT format
+ [nhk] Add support for audio URLs
+ [udemy] Add another course id extraction pattern (#20491)
+ [openload] Add support for oload.services (#20691)
+ [openload] Add support for openloed.co (#20691, #20693)
* [bravotv] Fix extraction (#19213)