This document discusses various codes and conventions that are commonly used in documentary films. It explains that documentaries often feature interviews where the subject is the main focus in a medium close-up shot, known as a "talking head." Establishing shots are used to set the location and time of events. Documentaries may also include reenactments to help viewers understand the content. Sound is an important element, with voiceovers, non-diegetic music, and effects added to engage audiences.