I found a cool browser extention that blocks ai slop on youtube. It uses a community sourced list, much like sponser block.

https://addons.mozilla.org/en-US/firefox/addon/ai-channel-blocker-for-youtube/

It can either put a overlay over the thumbnail telling you it's been marked as ai and has a button to show anyway or just hide it completly. I like the overlay option so I can click show anyway and then then the click do not reccomend option. Also super easy to submit any unflagged channels, a flag in the playback bar. It then goes on to be reviewed by people that make sure real channels don't get dragged in (they have a way to report false-positives too).

Maybe someone more familiar with extentions can help dig in to make sure it isn't doing something sketchy in the background.