I’m having the same problem. If I install the BlackMagic 10-bit codec it works.
I read that yes, it is a codec that comes with Final Cut that allows it to export/play those files on a mac (if Final Cut in installed), but won’t work on a PC. Blackmagic is the only codec (and free) that I found to work with it, although I don’t understand codecs that well and wonder if:
A) I had Premiere pro cs3 if it would work (I have cs2 right now)
B) if using the codec hurts the video quality any?
Anyone else maybe know?