It's a charicature. I'm not laughing because I think it's real (which would be kind of mean, anyway, since I'd just be laughing at someone screwing up). I'm laughing because it's relatable to real experiences many people have had, and because of the added commentary about software development.

Your hyperfocus on reality in media, and failure to see the comedy for what it truly is, is far more cringe than the video 😉

EDIT: it's like asking why people laugh at the obviously fake stories stand-up comedians tell because they're made up. Like, yeah, no shit, that's not the point.