I was looking for some footage of Adele Astaire.  The only thing I was able to find was this Youtube clip:

Public domain newsreels of Ginger making imprints at Grauman's Chinese Theater 1939,
receiving her Academy Award 1941,
Fred dancing and introducing his sister Adele at the Stage Door Canteen in London 1944,
Fred dancing on the streets of Paris 1944,
Fred and Ginger at the Oscar's 1967 (mute) and more.