As mentioned above, a movie from 1965; the only full-length movie to date (that I know of) entirely in Esperanto. It stars the one, the only, William Shatner, in pre-Star Trek days, and no, he couldn't act then either. Nor can he pronounce Esperanto worth a damn. The movie was apparently lost for a number of years, until a print was found in some basement somewhere. It's on video now, see http://www.incubusthefilm.com/ if you're a glutton for punishment.
The movie is in black and white, in Esperanto with English subtitles. It's about a war hero (Shatner) who is convalescing in a village whose waters are reputed to have healing powers. Because of this reputation, many decrepit old sinners have been known to frequent the place, and because of that, it has attracted a coven of succubi to prey on their souls. Enter Shatner, the war-hero saint, and his sister, and a succubus who is dissatisfied with preying on the flabby souls of the sinners who come to the town, and you have the makings of a... weird story.
OK, I didn't really enjoy the movie much, but it probably has all kinds of positive artsy qualities.