I was watching something recently about youtube ads and the top paying topics were all about money, videos about how to make money online was up there if not #1. You go and watch these and they all have the same content but presented slightly differently ("lets analyze X channel with Y subscribers, that channel gets $Z money per watch, its easy you just need to ...")
People are constantly thinking "I should do that" and will watch videos on it and even pay money to get an ebook or take a course on it. Maybe they start a channel, maybe they become successful?
I've seen a woodworking youtube channel turn into (in my opinion) a slimy "learn how to make money with a small biz" type of content where they just talk about their business. It feels like a lot of content is crafted to feed the algorithms for profit via ads.