Mark

Mark is a Canadian documentary film, directed by Mike Hoolboom and released in 2009. The film is a portrait of Mark Karbusicky, an artist, activist and frequent editor of Hoolboom's films who committed suicide in 2007, through a mixture of found footage, snapshots and interviews with Karbusicky's surviving friends and family.

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