" … deemed "culturally significant" by the United States Library of Congress and selected for preservation in the National Film Registry. In 1994 it was voted #19 of the 50 Greatest Cartoons of all time by members of the animation field. The film is now public domain." - Wikipedia
But don't let that stop you!
Although the directing credit goes to Dave Fleischer, the cartoon was actually the creation of veteran Fleischer Studios animator Roland Crandall. This was his masterwork; his "reward" for working so hard for Max and Dave though the years. The 7 minute cartoon took six months of labor, and is now considered an animation milestone. It is now in the public domain.
Take a look at Cab Calloway as Koko the clown moonwalking during the "St. James" musical number. The footage was rotoscoped from the real-life Cab dancing.