I watch YouTube through newpipe, and recently tried pipepipe too. They work great, but lately I have been blocked on several occasions with a message that either says “content unavailable” or “your IP has been blocked by YouTube”. I usually use a VPN which has helped but tried it today and still got this message :/
Finally changing the location on the VPN seemed to work. But seriously wtf is going on?
In situations like these, I call my IP and I ask to reset my line or change my IP.
You could probably log into your router and release/renew your IP.