id.420129.xyz is an Invidious instance, an alternative front-end to YouTube.

Invidious is currently suffering due to new 
     YouTube changes and cannot serve your request.

This issue is tracked here: https://github.com/iv-org/invidious/issues/4251#issuecomment-2837678730

I'm very sorry for 
     your inconvenience. Please understand, that those issues just happen and will keep happening. That's the nature of services like Invidious.

Instance / contact info can 
     be found here: https://id.420129.xyz/about