My @YouTube app has inexplicably began stopping autoplay, seemingly at random, and insisting I press a button to continue to the next video on the viewing list.
Since I mostly use autoplay to cycle music while I'm carrying groceries home, this is INFURIATING.
If you don't want to Autoplay videos on Home, you can turn it off from Settings > go to Autoplay > then Autoplay on Home, you can turn the feature on, off, or change to only play on WiFi, more info here: https://yt.be/help/6eWp . Hope this helps!