I can hear the sound of the video, but can't see a picture or vice versa. What should I do?

Make sure that you have Adobe Flash loaded to your computer. You can download this program at http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash.

You should also make sure you have the most updated version of Quick Time on your computer, which is available for download at http://www.apple.com/quicktime/download/.