I dont think its fake, just think about why he would fake something like that.
IF it is fake then its not funny, so if its fake he would presumably tell his friends etc that it was fake...so then why has he done it...its pointless and they'll all just think "WTF...This guy is a retard". If it is fake and he doesnt tell people that, they'll still think he's a retard who likes to shove remotes up his arse.
So basically, if its fake its pointless and loose loose for him.
I think he's just an absolute mentalist, if you watch his other freak out videos you'll see he is just a crazy...