refers to an experimental, abstract, or highly independent, non-independent film that is often the forerunner of a new artistic genre or art form; avant-garde films self-consciously emphasize technique over substance; also loosely applies to a group of French and German filmmakers in the early 20th century and to some modern American experimental filmmakers (e.g., Andy Warhol), and their film movement that challenged conventional film-making; see also cinema verite,surrealism, and abstract form