Not film documentaries, documentaries about films.  There is a difference; these are not your typical behind the scenes, how a movie is made kind of docs. 

These are about how some movies never got made like The Death of Superman Lives, Doomed, and Jodorowsky's Dune.  Or movies about how people interpret Kubrick's The Shining like Room 237. 

Plus many, many more.  Join Carlos today on GeekFest Rants as he explores all these excellent documentaries(about films).