Seems like Piped and Invidious are both on their last legs. Public instances on both services are pretty iffy, they go down fairly often now. Freetube works well on desktop but no real way to sync subscriptions and watch history to a phone. Self-hosting Piped/Invidious might be the solution but I don’t know if it’s worth the upkeep when YouTube is actively fighting against it.
I found a smaller instance of Invidious whose been taken down and rolled over to a new IP within a couple hours. I’m feeling pretty safe where I’m at.
Long term I’d like to see PeerTube become a viable alternative but I don’t really see that happening.