The Guitar Mongoloid

The Guitar Mongoloid is a 2004 Swedish drama film written and directed by Ruben Östlund, about different people living outside the norms in the fictional city Jöteborg, strikingly similar to real-life Gothenburg. Although not a documentary, most of the people seen in the film are non-actors more or less playing themselves.

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

Poster © the film's rights holders.