Besides, does Google/YT even specify the reason for bans? Don't they just write something vague?
What he probably meant is that people who are logged into the Google Services with their google account got im trouble for using NewPipe, which to me seems unlikely. I doubt that Google got away with something like that!
I suppose and app like this could provide a third party (self host able api) account service - recording history and managing/syncing playlists? Maybe with an option to merge in entries from Google account playlists from time to time?
Playlists are nice not just for playing/listening, but also downloading for offline use/backup/archive.
Ed: i see that it has local history and playlists, with option to export data - but apparently no option to load data (whether from youtube/Google or an earlier export).