Is there any way as a consumer to discover new content (matching my taste) on Youtube. Seems like newer channels struggle a lot with this problem.
Perhaps use browser profiles to separate your logged-in and logged-out 'personas'.
If you want to watch a video, but don't want it to contaminate your current preferences, watch it in a private browser window.
If I watch a cat video, it'll think all I like are cats.
I may like content about Foo — something entirely unrelated to cats — if I watch it. But since I have never watched anything about Foo before (perhaps because I didn't know about its existence), it won't recommend me Foo. Therefore I wouldn't know it exists. Hence I never see it, even though if I had seen it I may (or may not) have liked it.
Meanwhile, after a point I get tired of all the cat videos, and stop using the service.
I want recommendation engines to occasionally recommend totally fresh content unrelated to anything I ever watched.
YouTube home page despite popular opinion is my best way to find new deep interesting content.