You have a good ear because i didn't catch these. However, they could be allowed to used them through licensing agreements or could be using common adaptive music.
If true, this is unacceptable. What makes youtube or any other SM company think they can do this without telling us first? We should be able to disable the algorithm if we don't want that "personalized experience." We need some serious legislation here. In the meantime, I've had it. I'm finding alternative sources of news and entertainment services that don't treat us like cattle.