The document discusses the codes and conventions commonly found in documentary films. It notes that documentaries often feature a voiceover narration from an expert in the field to guide the audience. Documentaries also use interviews with real people involved in the events and "real footage" captured without actors to achieve a sense of authenticity. Additional conventions include the use of on-screen text, sound design, reenactments, and an unscripted camera style to further enhance the non-fiction nature of the documentary format. The document provides examples of several types of documentaries and explores techniques like voiceovers, interviews, and raw footage that are frequently employed to inform and engage audiences while maintaining a realistic portrayal of real-life people and events