A PLOT HOLE???
In the film Thierry states that he turned to "art" only after Banksy said him to, and only then he came up with the alter ego of Mr.Brainwash. However, in the trailer of the Thierry's film which is available on Youtube Mr.Brainwash already exists.
I finished watching the film just an hour ago, so i am still somewhere between whether it is real or a hoax. However, the message is conveyed successfully in either way, and thus this was deserving of a nomination.