I don't use the film viewer. I don't know how you get anything good out of that thing.
I used to get some good stuff using my NVidea GeForce recorder but the latest update bricked it, so it just crashes.
Fly your skin offline and save the film. Do a bunch of turns and banks and climbs and go inverted. Spend about 10-15 minutes over an isolated field. Use that film to take screenshots.