Originally: a lecture or presentation, usually accompanied by the showing of slides or a film, in which a traveller talks about the places he or…

An instructional film, book, etc.

a film, esp. a documentary, compiled from various pieces of film, all or most of which were originally shot for a different purpose.

A dramatized film (usually for television) which is based on a semi-fictional interpretation of real events; a documentary drama.

A documentary (now usually a film) on the subject of rock music or rock musicians.

(the medium of) dramatized documentary; = docudrama, n.; frequently attributive.

A documentary film with shocking, tasteless, or voyeuristic subject matter.

A film or other presentation which includes documentary materials, and seeks both to inform and entertain; entertainment provided by such…