A documentary film is a movie that tells a true story about real people, events, or topics. It presents information and facts while aiming to educate or inform the audience about a particular subject. Full definition
An award - winning documentary film about peak oil. (climatestate.com)
Among the extras is a making - of documentary filmed in the distracted observational style of the movie itself. (theartsdesk.com)
The 40 - minute work explores loss and grief as much as the narrative constructions of fiction and the cinematic conventions used in documentary films. (en.wikipedia.org)