The phrase "a loop of film" is correct and usable in written English.
It can be used to refer to a continuous strip of film that is looped for projection or viewing purposes.
Example: "The old projector played a loop of film that showcased the highlights of the festival."
Alternatives: "a film reel" or "a film loop."
As the time dripped by, we were placated by the Original Series episode The Corbomite Maneuver (the first regular, non-pilot episode of Star Trek filmed), a loop of the film's trailer, some red carpet interviews, and a cobbled-together costume contest that was almost won by a woman in an outfit she claimed was inspired by the dragon Smaug from The Hobbit.
They include the well-known Metro-Goldwyn Mayerr," a loop of the film studio's roaring lion mascot, and "Shane," named for the trained German Shepherd that barks in response to inaudible commands from someone behind the camera.
He drives the narrator to Niagara on a job, then abandons him for hours in a "museum of curiosities", leaving him to watch the same loop of film about Niagara barrel-jumpers over and over.
I think I'd prefer the film minus the audio; the subsequent elimination of the scant storyline replaced with a loop of Duke Ellington's Mood Indigo the film's namesake.
The 102 rooms are spacious, a loop of "Vertigo" (which was partly filmed here when it was the Empire) plays in the lobby and, during the check-in, you'll receive a list of the best places in the city to "get vertigo," including Twin Peaks and the top of Coit Tower.
In the new design, whose mechanics were housed in a wooden cabinet, a loop of horizontally configured 19 mm (3/4 inch) film ran around a series of spindles.
It's a continuous loop of a film in which the figure of a naked runner passes through a surreal succession of scenes – each composed as a collage of cinematic, painterly imagery.
