However, YouTube provides a mobile site, no matter what I set as UserAgent, I never receive the HTML5 media player with speed controls.
For example, set your UserAgent to
Mozilla / 5.0 (Linux; Android 7.0; Redmi Note 4) AppleWebKit / 537.36 (KHTML, Gecko) Chrome / 70.0.3538.80 Mobile Safari / 537.36
Then go to
m.youtube.com start a movie.
Is there anyway any speed controls on the YouTube mobile site?