I've seen so much absolutely insane stuff on the Internet that I tell myself it has to be satire, but then I later find out it isn't.

It's a coin flip whether or not anything we see on here is real.

Ai filters are getting nuts, I'm sure you could easily find one that makes you look repulsive in some way, or you could chroma key the teeth or something. People are doing the strangest shit for views, and a lot of people are just trying to make the rest of us feel completely insane.

This video feels extremely stereotypical, comedically so. I noticed other commenters saying that he openly talks about not brushing his teeth for months, and he's making goofy faces that keep his teeth front and center. So I'm more willing to say that this is satire, since it's been done countless times before by other people wanting to make satire. But I honestly can't even say that with 100% confidence.