Currently Being ModeratedMar 26, 2013 6:20 AM (in response to cdonley21)
What's the exact error displayed when you try to play the file in QT? Did you test it in VLC player?
Maybe your clip has got corrupted somehow. Check whether any other copy of the file is able to play.
If no other copy is available then you could check whether the file can be repaired using Treasured. Best of luck!
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