"Soundies" were the granddaddies of music videos: single-song musical movies that played in special jukeboxes during the 1940s. Some of the biggest musical stars (and stars of the future) appeared in these films: Louis Armstrong, Spike Jones, Liberace, Fats Waller, Stan Kenton, Cab Calloway, and many others. Thanks to Soundies, hundreds of unique musical performances were photographed for posterity. These mini-musicals were originally nothing more...