Google have rough up with their YT app for Android media player users. The solution I know is to use
Smart YT app instead, installs from downloaded apk, but it works decently, even with 4K res. As far as I know it also can auto update itself, but someone correct me if i'm wrong. The other app I know would be YouTube Vanced (didn't tried so far).
I would be also interested in other solutions/YT apps if anyone else have found some.