Wikipedia
Decasia is a 2002 American found footage film by Bill Morrison, featuring an original score by Michael Gordon. The film is a meditation on old, decaying silent films. It begins and ends with scenes of a dervish and is bookended with old footage showing how film is processed. Nothing was done to accelerate the decomposition of the actual film prints, some of which were copied from the University of South Carolina's Moving Image Research Collections.
The film's musical soundtrack features several detuned pianos and an orchestra playing out of phase with itself, adding to the fractured and decomposing nature of the film.
Two films have been positively identified: J. Farrell MacDonald's The Last Egyptian (1914), written, produced, and based on the novel by L. Frank Baum, and William S. Hart's Truthful Tulliver (1916).
In 2013, Decasia was selected for preservation by the National Film Registry. It was the first film from the 21st century to be selected. Decasia was included in the September 2014 box set release of Bill Morrison's collected works, from Icarus Films.