And the theatric "you're fired, get the hell out" thing at the end? The firing end of that conversation doesn't usually work like that, either --- except in the movies.
If the boss saw the videos where Scotty mocked him then he might be pissed--the binging clients will discover videos of him looking foolish and incompetent.
Yeah, and I did find one small error. At around 2:20 he starts hitting himself in the head while at home, and then it switches over to the hidden camera. At 2:23 you can hear him hit himself once more when the boss starts to speak.
So unless I get convinced he starts hitting himself in the head while arguing with people, I think this is fake.