Why does video black out toward then end when playing back an avi file from CamStudio?

Audio plays back great to the end, but video becomes a black screen from halfway on some to close to the end on others. This happens for both the CamStudio player and Windows Media Player.

If it does it the same way with both players, the problem is most likely something in the way the video is being made. First thing I'd look at is the memory and the speed of the computer/graphics card. Make sure you've installed the lossless codecs:

http://www.irongeek.com/i.php?page=CamStudioOSS/camstudio