If a submission is longer than 5 minutes, do I need to send in the complete project? I uploaded trailers for these two projects. One is a feature film, and another a 10-minute short film.

No, you do not need to submit the full work. Your online submission may include an up to 5-minute excerpt or trailer. If you are entering by mail, you can submit an up to 5-minute excerpt, trailer or you may send a DVD of the complete project with a note clearly saying what 5-minute portion to view.