Elegance Bratton’s documentary “Move Ya Body,” which tracks both the artistic evolution of house music and its historical and sociopolitical impact, emerged from the unlikeliest of sources: Hillary Clinton. Bratton and “Move Ya Body” producers Roger Ross Williams and Chester Algernal Gordon visited the IndieWire Studio at Sundance, presented by Dropbox, to discuss the origins of the film. Williams was approached by the former Secretary of State, a Chicago native with a deep passion for the city’s distinct brand of joyfully repetitive dance music. He then brought Bratton, who was eager for a fun “palette cleanser” after directing “The Inspection,”...