Thanks for your reports about YouTube, YouTube TV and YouTube Music access issues. We're working on resolving this and will let you know once fixed. We apologize for any inconvenience this may cause and will keep you updated.
(On iPhone) I reset the app like 5 times, redownloded twice, reset my network settings, restart my phone once (technically two with the reset network settings), reset the modem+router, delete and redownload the app twice idk if that’s everything but I was stressed lol