I just thought of a way to reduce the controversy associated with categorisation. The solution is the foundation of any democratic society: freedom of choice.
What we can do is to decide on the categories here, on the Forum. We'll come to some form of concensus perhaps through the use of polls etc. Then when it comes to movie submission, the person submitting the film will be given the choice of choosing the category that his/her film falls within.
The beauty if this is that if the fella categorises his/her film incorrectly, then no one can be blamed for giving it a low score, even if the film was good. Accountability is shifted from moderators to the film makers themselves.
There are still huge problems with deciding on categories though, because films do not necessarily fall within clearly delineated boundaries. In critical literary theory, I believe the cross-fertilisation of genres is known as 'Intertextuality', and virtually every movie or media object bears this trait. For example, it's not uncommon to find romance in a comedy (hence the label 'romantic comedy') but to resort to this sort of preciseness here in the AlamDV cinema would be to complicate matters too much.
I propose that the division (should it happen) be a simple one: e.g. Film (expected qualities: plot, minimum length..etc); Trailer (expected quality: semblance of plot); Extended FX test (expected qualities: use of effects, minimum length); FX test (expected quality: use of effects). Sumthin' like that