It has just been called to my attention that this is the birthday of Art Tatum (1909-1956). Before the day expires, at least in my time zone, here 
is one of the few instances of Tatum’s being caught on film. The clip is from the 1947 movie The Fabulous Dorseys. It finds the great man in a jam session with his peers—as if he had any. This may not be the most stunning Tatum ever recorded, and he gets only one chorus of a fast blues, but we see as well as hear the pianist who awed his contemporaries, including Earl Hines, Teddy Wilson, Vladimir Horowitz and Artur Rubenstein. Tatum’s colleagues are identified in the opening frames.