I'm surprised but the other film by Jan Lenica, Ubu and the Grande Gidouille, is no on YouTube with English subtitles. While his first film, Adam 2, was made in Germany and had German language intertitles, this film was made in France and has actual French Dialogue. It's based on the Alfred Jarry play Ubu Roi. The film is probably better seen than described, so here it is:
The embedded version seems to cut off at the bottom so you'll have to watch it in full screen. But you were probably planning to do that anyway. It's sure an exciting time to live in with all these rare animated films available to watch. Hopefully a DVD collection with all of Jan Lenica's work, long and short, will be made available. Enjoy the film and if you like, leave a comment letting me know what you thought.