Currently the AH film viewer is tied to the game files. It reads them to display your gunsight, for example. One thing it does not read are head positions, unfortunately. You can set them yourself inside the film viewer but that's just annoying.
I wish we had a separate folder for gunsights and head positions that the film viewer would read head positions, gunsights, etc.
That way if somebody wanted to get creative they could compare head positions from different players (swap those files in and out of the film viewer without ruining your in-game files!) using the same film and compare, as well as swapping out gunsights to fit the mood of your film.
I would just really love a directory I can plop all my head position files into so that when I'm in a film viewer it replicates what I actually see in-game, instead of the annoying defaults!