I also wonder how much a certain sponsor influence the video topic

Literally anything can influence the creator. I watch Max Miller’s Tasting History, and he’s unrepentant that he chooses certain foods to go with wine or coffee from his sponsors. But, he also makes entertaining history pieces to go with it, and that’s what I’m there for.

Jon Townsend will happily sell you reproduction kitchen equipment from his own store, which is heavily featured in the videos.

At the end of the day, creators have to get paid somehow. Sure, some creators are doing it for free because they have a day job, or whatever, but even then you can be pretty sure they won’t do anything to jeopardize their paycheck.

I think the most we can hope for is that creators tell us when they are are influenced by advertising.