Netflix audio works, but no video

Im wondering if this is a common issue someone can help with.

Im not sure what information you'll need, but feel free to ask, and i'll try to supply you with what you might need to better answer my problem.

I have a computer, an Athlon 64 X2, with a nVidia Geforce 7200 GS video card, and using the S-video to an CRT TV. On this computer I have installed XBMCbuntu. Not even sure what version this is, 12.2, I think. The base Ubuntu I believe is 12.10.

I used the below to install netflix-desktop:
http://www.tmib.net/netflix-xbmcbuntu-using-wine

I can get to the point where one runs the application from the 'desktop' in XBMCbuntu. Wine starts, Firefox starts, and I can log into Netflix. And here is the rub:
I can play a video, and sounds works fine, but I get no video, just black screen.

I can pause the video with the (temporarily attached) space bar on the keyboard. And then get the toolbar in Firefox, and go back and choose another video, and same thing: audio, but black video.

thanks.