TURN-ONS AND TURN-OFFS IN CURRENT HOME ENTERTAINMENT RELEASES : Excellent Good Fair Poor : Videocassettes

“Piano Players Rarely Ever Play Together.” Stevenson Productions. $ 75 (76-minute version), $50 (60 minutes). Three New Orleans pianists from different generations ---- Tuts Washington, Prof. Longhair and Allan Toussaint ---- reveal much of themselves and America’s musical heritage as they discuss the hard specifics of their art. the documentary really soars after they’re his with the proposal that they team for a performance; their surprised reactions are priceless. But before the concert finale, there’s a funeral to attend ---- a sad twist to an illuminating study. Information: (504) 822-7678.