Sideloaded the latest and greatest YouTube++/uYou/uYouPlus/(currently uYouEnhanced) on my iPhone and re-sign it weekly with AltStore, Trollstore, or use a jailbroken equivalent on a device that managed to stay jailbroken.
There’s a few other new options I’ve seen through Reddit for web viewing, iOS content blockers, or hosting your own VPS invidious/piped instance with rotating ipv6 servers (not google/aws/digital ocean as they require using a web panel).
You can leave ads on for whitelisted creators sponsored advertising content also.
I don't want the ads, but I'd rather see the carefully curated list of creators I care about be able to get paid, and Youtube Music works for me. Youtube Premium is worth it.