Sorry to hear you're having some trouble viewing the video!
First and foremost, make sure that you have - in fact - downloaded the video in full, and extracted the Quicktime file from the .zip folder properly (right click >> unzip / extract). Further, make sure you have the latest version of Quicktime.
Rest assured, we'll stick with you until all is resolved. Shoot me a PM if you're still having issues and we'll figure it out.