The Show of Shows: 100 Years of Vaudeville, Circuses and Carnivals

The Show of Shows is a montage documentary film about vaudeville, circuses, and carnivals which was assembled from footage from the National Fairground Archive. It has an original soundtrack by members of Sigur Rós and the composer Hilmar Örn Hilmarsson, and was commissioned by BBC Storyville and BBC North.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.