Watch HDToday. This is Les Blank’s earliest music film, focusing on the renown trumpet player, Dizzy Gillespie, who along with Charlie Parker, Thelonius Monk, Sonny Rollins and others sparked the change from traditional Jazz to “Bebop” in mid-1940s America. The film includes rare images of Gillespie playing on his famous bent horn and talking about his beginnings, as well as his theories about music.