Hi,
I've been having similar issues in Vista 32. I installed the Quicktime 4 that came with the game and the movies just showed up as a black screen with glitchy audio. I tried a bunch of variations of compatibility settings, and I tried what techLords and StarDruid suggested above, but it didn't change anything.
I googled a bit more and found mention of Quicktime Alternative, so I downloaded that (version 2.9.0 from filehippo.) In the Preferences for Quicktime Alternative on the Audio tab I set "Play Audio Using" to "Safe mode (waveOut only)" and took the Rate up to 48kHz. and on the Advanced tab turned off DirectDraw Acceleration, DirectDraw on secondary monitors, and Direct3D video acceleration. Then I decided to just put Video on "Safe mode (GDI only)" just in case.
Now I wasn't getting any AV at all... it would just skip straight to the main menu when I ran the game :(
But persevering, I played with the compatibility settings and found that using compatibility mode for Windows XP (Service Pack 2) and NOT running as administrator worked!
I hope this helps someone.