Vincent (1982)
Vincent is a 1982 stop-motion short horror film written, designed and directed by Tim Burton and produced by Rick Heinrichs. At approximately six minutes in length, there is currently no individual release of the film except for a few bootleg releases. It can be found on the 2008 Special Edition and Collector's Edition DVDs of The Nightmare Before Christmas as a bonus feature and on the Cinema16 DVD American Short Films.
More at Wikipedia.