OK, but just using Portal to grab extra views.
OK, I don't deny this is a pretty OK video. The turrets are animated OK, the premise is OK, and the jokes are pretty good. But the thing about the video is pretty much this: There's no reason for them to be Portal turrets. You could replace them with office workers, security guards, or hell, even zombies and it would still be the exact same. There's basically no references to the setting of Portal itself (and the "working conditions" are kind of different than those in Portal, but that's kind of irrelevant) so it seems like making them turrets was just an idea to make more people watch it.