Earlier quoted context omitted.
The whole YouTube app is weird. Sometimes it lets you do 1.0x-2.0x. Sometimes it lets you range from .25x-4x. Sometimes it pops up a text selection box with every .05x option from .1 to 4.0. Sometimes it has a nicer UI with shortcut selections for common choices and a sliding bar for speed. It recently picked up a bug where if you're listening to a downloaded video, but turn the screen off and on again, the video pla…
the control changes sound like you might have gotten caught in some kind of a-b testing
Also there is never a sensible reason to offer video speeds as a combo-box popup of all options from .05x to 4.00x. It's like three times the vertical size of my screen.