Loop

From LatexWiki - the free latex fetish encyclopedia

A loop is industry vernacular for a short pornographic film, often without sound. Most are cheaply made and of poor quality. Before the advent of home video, such films were typically viewed by a single person in a booth, and the film was "looped" so that it could be played repeatedly when activated by a coin payment slot or similar device.

This article on "Loop" incorporates text from from Wipipedia.