I wouldn't easily dismiss 3B1B, Lex or whatever resources you've mentioned here. Though you might find them to be entertainment but really people learn in various ways and these resources provide excellent views on the subject. And honestly with all the recent advancement in visual content and media, I would reconsider the sole dependence on hard literature to learn or even question the superiority of hard literature over newer formats.

Lastly, I agree that the title should be resource list.