This movie filmed around 1950 was made by Maya Deren, a dancer who became interested in film. While a book by the same name was published, the film was not finished & released till after she died.
This movie was shot on that stuff called "film" and is really worthwhile to watch on DVD. Also, there is a section on 'Animal Sacrifice' that some people might want to skip which would also be easier to do on DVD.
Overall, a decent & easy intro to Vodou.