Log Message:
youtube-dl: Update to 20190702

Changes:
2019.07.02
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Core
+ [utils] Introduce random_user_agent and use as default User-Agent (#21546)

Extractors
+ [vevo] Add support for embed.vevo.com URLs (#21565)
+ [openload] Add support for oload.biz (#21574)
* [xiami] Update API base URL (#21575)
* [yourporn] Fix extraction (#21585)
+ [acast] Add support for URLs with episode id (#21444)
+ [dailymotion] Add support for DM.player embeds
* [soundcloud] Update client id