Wow, a whitelisted, non-algorithmic feed of videos! Oh wait, do you mean... a playlist?
She pays for YouTube Red. There is no way for YouTube to not autosuggest, or to repeat the videos in a Playlist over and over.
I decided for her to use YouTube because of the auto caption. Will need to find some other solution...
I'd rather not install a computer there just to show some videos...and I don't know why YouTube forces the suggested videos to paying customers without giving an option to turn it off.
If there is a way to create that whitelisting I would happily pay. If there was a Foss alternative I would happily join.