The document provides an introduction to documentary films including what they are, what they aim to do, and different modes or styles of documentary filmmaking. It discusses how documentaries explore real people and situations but different modes may include narration, observations without narration, include the filmmaker, or take a more experimental approach. It also addresses the "contract" between filmmakers and audiences where documentaries aim to tell the truth in an authentic way and discusses some ethics around representing subjects. Finally, it outlines best practices for documentary production including research, interviews, filming, editing, and distribution.