The document discusses the history and purpose of documentaries. It notes that documentaries began in the late 19th century with short factual films created by the Lumiere Brothers to document aspects of reality. The first feature-length documentary was Nanook of the North from 1922, though the term "documentary" was coined by John Grierson. Documentaries aim to inform and educate audiences based on true facts and real situations. Common documentary techniques discussed include interviews, observations, cutaways, narration, and reenactments.