https://xcancel.com/KellytoyDK/status/2065524085602374041 / https://ghostarchive.org/archive/kqfii
You can turn this off by changing the channel visibility for shared links in the Privacy settings:

Never share YouTube links with their source identifier.

Here’s some Youtube frontends:
- FreeTube: https://freetubeapp.io/
- Grayjay: https://grayjay.app/ / https://grayjay.app/desktop
- NewPipe: https://github.com/TeamNewPipe/NewPipe
- LibreTube: https://github.com/libre-tube/LibreTube


I’ve been using URLCheck.