What I would really like to see is a YouTube video collection powered by the TikTok recommendation algorithm.
TikTok video proposals are much more adaptive and much more nuanced. There I found out some content through recommendations that I would never search for, but truly liked it.
Of course, not sure how that would work with longer videos, but I can suppose at least for music length it would be good enough, and for longer videos it may need more time to train the engine before starting to recommend.