This document discusses conventions for short films. It notes that short films typically have 2-3 main characters to allow viewers to relate to them in the limited time. It also discusses keeping a low budget with few locations and actors, a typical length of 5-10 minutes, and storylines that take everyday situations and flip them to intrigue viewers. The document also discusses the film "Signed" and how it adheres to these conventions as an independent documentary about unsigned bands with a limited budget and three main acts.