For this you need to beat every film challenge in game. This is pretty hard to do. You must complete every single filming session for Thrasher and the Skateboard Mag. After you finish the main storyline there will still be a couple films left for you by pressing the right bumper. Some of the thrasher shoots in a no skater zone, and are quite brutal. I suggest doing them at the hospital or at the spot where Big Black and Rob’s challenge is. Some of the films are also very easy to do off of the Mega ramp at the X-Games (big score ones).