I don’t think he’s as dumb as he seems in some videos. His persona and mannerisms are very much a pan-Scandinavian thing. To me it’s a throwback to the early 00’s, when we filled our brains with plenty of Jackass, Blink 182 and Eric Cartman.

You halfway answered your own question there. Just like in games and movies, they are lazily leaning on nostalgia in the hopes that it will magically generate some money.