Really, 33 minutes is a little quick to be getting impatient, especially in the middle of a workday.
In all likelihood it's a MPEG2 encoded file, which QT doesn't support without a non-free plugin (I think it costs $20 from Apple). VLC, as mentioned, will play those just fine. QT does play MPEG1 (and MPEG4, of course) video without issue, though.