Many of the early Betty Boop cartoons are a lot like music videos. When they begin, they prominently feature a musical act of the day and you see live footage of them performing. Interestingly, the Fleischer Brothers Studio often featured black acts--bucking the usual trend at the time. Cab Calloway and Duke Ellington have been in these films and here we have a lesser-known but very talented Don Redman along with his orchestra providing the music.
The cartoon itself has a bit more plot than I expected. Bimbo, KoKo and many others work at the Never Mine mine--and Betty works at the café that feeds these guys. The first portion of the film is chock full of sight gags (making it very fast-paced fun) and the final portion is surreal--with Bimbo discovering some bomb-tossing ghosts in the mine!
This cartoon made me laugh several times--and that says it all. I especially liked the ending--dark but very funny.