The “lost” masterpiece by legendary documentarian Les Blank. In 1972-74, cameraman Blank and his crew hung out with studio-musician-turned-rock-star Leon Russell on the road and at Russell’s Oklahoma recording facility, observing everything that went on, from cutting records to horsing around. The production was a contract job bought and paid for by Russell, and when he evidently disapproved of it, the film disappeared from public view for forty years. Seen from that remove, it fits firmly into Blank’s catalog of musical Americana, a perfect example of the down-home informality that made him famous. The music is wonderful, from Russell’s rock and country soul-shouting to cameos by George Jones and Willie Nelson (90 min.).