Last fall, music producer Hal Willner gathered a group of heavy-hitting musicians to raise money for the Clinton Foundation, with a set list honoring the 50-year-old Freedom Rides movement that stormed buses in the American South. Footage from the concert -- which featured Tao Seeger, Eric Mingus, Tim Robbins and Lou Reed among others -- is slowly leaking out via Dailymotion, one of Willner's sponsor.