ooh...that's a tough one. I'd definitley try to pull that dent out a little before adding any filler.
The good thing about film - it can hide a great deal of imperfections on a bike.
Think about it this way - the camera is usually 10 feet away. When it makes it to the big screen, people watching will be even further away.
If it were me, I'd strip the paint, then I'd try to pull that dent out as much as possible. Get a good filler with a hardener and smooth things out.
Prime, them paint. Even krylon would likely be good enough for the film.