Their recommendation algorithm is pretty terrible and seems to be based around people linking remotely to youtubes, rather than finding things on platform. Watch one “sleep white noise” video and that’s all that shows up in recommendations despite hundreds of subscriptions.
Like almost everything else Google it’s sort of not improved in 10 years and one can bet they’re ramping up “AI” recommendations internally right now to get near where TikTok was 4 years ago without “AI”.