I’m also having the same problem trying to figure out how to scroll horizontally thru the YouTube search results listings. I think I almost remember doing it successfully like 1 time the first time I used the app when setting everything up on the new smart tv, but have been unable to figure it out or do it successfully since. I can’t find anything else on how to fix this online either??
the results listings appear to get cropped off of the tv screen about halfway thru the 4th listing image & description so I feel like there MUST be a way to do this