Youtube doesn't care about that. At least, content creators don't generally take that chance. There is very little recourse if Youtube decides your content violates their rules.

That was from the "mild" section, too. Looking at the more extreme bullet point for the same rating, there's

> It may also include pervasive imagery or situations that are disturbing or repulsive to the average viewer.

Which, given that the entire video is about literal buttholes and feces, probably fits to some degree.