Color settings for video demos in Captivate 7 and 8

I have been working with Captivate 7, and I recently got the Captivate 8 upgrade.  I haven't been able to get good quality colors in my video demos in either version.  I can select either 16 bit and 32, but the resulting video looks exactly the same, like when I change my monitor to display 16 bit.  Software simulations look great, but I can't seem to change the color setting for the videos.  I've changed the settings both in general and in individual projects, and still no change.  I'm using a Mac to capture video on Windows 7 through VMware.  I've tested the video demo capture on the Mac, and it's showing the same degraded colors.  Any ideas?