“watching paint dry”
The feature length plus film with a fun backstory.
Paint Drying is a 2016 British feature film directed and produced by Charlie Lyne. The film is about paint on a wall drying, lasting for 10 hours and 7 minutes.[1][2] The film was created by Charlie Lyne in order to force the British Board of Film Classification (BBFC) to have to watch all 10 hours to give the film an age rating classification, as a protest against censorship and the prohibitive cost to independent filmmakers (usually £1000 per film) which the BBFC classification requirement imposes.
https://en.wikipedia.org/wiki/Paint_Drying