Why do I get a white blank screen but can hear the audio?

[jamiethomas]

I'm a PC user (don't hate me) and a colleague created a movie for me in imove and gave me the .mov file. No matter what I ry and play it in I hear the audio but just get a white screen - am I missing something here in my setup or downloads? You can grab a look at the movie here

http://www.capitaldigital.co.uk/clip.mov

I need to know if he's supplied it correctly - help!!