(Tip of the hat to faithful reader DM who made me aware of this video)
Parov Stelar is an Austrian producer and musician specializing in electro swing (whatever that is!). This is Booty Swing which freely samples Lil Hardin Armstrong's 1938 hit, Oriental Swing. Hardin was the second wife of Louis Armstrong.
The video features footage from dance films of the 1930s, mostly starring Fred Astaire and Ginger Rogers. The opening scene is from their 1936 film Swing Time.