One of the original reasons that encouraged us to create a film that you could watch forwards and backwards was the fact that you could add a parameter to the QuickTime embed code that made the player show the clip back and forth. The parameter - loop="palindrome" - will play the entire video forwards, then start playing it backwards when it reaches the end. Here, finally, is 12:21, in the QuickTime player with the palindrome parameter that started it all: