At the 19th annual "Last" Chicago CoCoFEST! in Elgin, IL this past weekend (May 15-16, 2010), John Linville had a CoCo 3 playing full motion video with sound. It was a bare CoCo 3 with a Cloud-9 IDE drive interface (reading the data from a Compact Flash card, I think). This clip doesn't have the sound up (I did not know it had sound at the time) but I will post a better one with an interview later. He also has a 256-color mode version which uses the recently discovered 256-color composite video mode.