Comment by InternetUser

To solve that problem: when you're logged in, go through the suggested-videos margin and right-click on the suggested videos that appear irrelevant or awful to you, and you can click either "Do not recommend channel" or, more mildly, "Not interested." Do that a few times and you'll see the suggested videos get far more relevant to what you want to see. Yes, they definitely have an agenda in terms of the channels they push, whether it's political news clips, late-night talk show interviews, celebrity gossip, or zany pranks and challenges, but you can block them all. They love CNN, Joe Rogan, the Kardashians, and New York City real-estate mogul Donald Trump, but you don't need to see them if you don't want to. I've also done this with my Instagram "Explore" page and now it's always nearly all posts I'm definitely interested in, like about technology, science, astronomy, history, archaeology, coins, all sorts of stuff I like, it's great.