Other than the attempt to make the most money possible, youtube isn't attempting anything else. None of these social media platforms give two hoots about being a social service. Their #1 priority...and #2, #3, #4 priority...is to make money. Hard news, human interest, or cultural things like cooking are all of greater interest now because of the potential war in Ukraine. Who are these people? What the heck is Ukraine anyway? What do they wear there? Are they nice people or jerks? Are they like us (fellow jerks)? Spanish speakers are watching as well. I believe I read somewhere that Spanish speaking creators are the #1 growing population of creators. Videos on youtube are tagged as well as titled. All kinds of metadata is embedded to feed into the algorithm streams. Again, you're getting Ukranian videos and Spanish language videos because you're deleting your history. Every time you click into youtube, it has to assume you're a new user, and they have nothing in which to base the video feed. If you don't play the delete game with their cookies, it will learn your preferences.
I watch youtube via TV. Two TVs. Never log in. Each TV gets a different feed because I don't watch the same things on either TV. Almost nothing is repeated on both feeds. It's like two completely different households are watching those TVs, even though they're coming into the house on a single line. It learned what each TV is watching. Though not logged in, all the channels and creators I watch are there when I turn it on. That's through Xfinity cable provider. I don't know how others work.
*I never delete my youtube history. Not for any particular reason. I just haven't.