The 44 minute vehicle is about slapstick gags and making fun of Hitler as well as Benito Mussolini and Suki Yaki. It's not available on DVD or even VHS, apparently, but you can watch it on Turner Movie Classics whenever they air it. You can also click the above link to read a full synopsis with pictures.
I mention this because I just read a review about it on the International Movie Database wherein user dbborroughs from Glen Cove, New York, made this comment:
Its a very odd feeling watching the Devil run around trying to prove Hitler isn't all bad, especially when he uses examples of Hitler's cruelties that are actually much worse in retrospect than what was known when this film was made. In its way the film is almost an exercise in bad taste as a result of the revelations that followed.
The worst Hitler does in the movie is order the execution of people...I don't know what planet "D. B. Borroughs" is from, but it's possible he's from Planet Moron.