Hello, I had the same issue.
With same video of YouTube and under same internet connection, in a Samsung Tablet I see video in best resolution (1080p) but in the iPaly20 table video is very low quality and I can’t select the option to upgrade video quality.
Of course i have bought this tablet for watch YouTube video first but this basic function is not working like must work so this tablet is not good and useless.
The solution of rollback YouTube app version I think is not a solution because the issue must be resolved otherwise this tablet is only rubbish.
