Man, you would think Don or Ralph might occasionally vist this area to help with answers to questions on a product they developed. 3D arsenal is great when functioning properly, but if there's a problem...you're screwed unless someone else has had a similar issue and managed to figure it out!!!!
This has already been answered by Don: The image editor is not where you map images it is where you can load, save and edit images. Go to the surface editor to map images. In the scene you are using there should be 3 surfaces named video_01, video_02 and video _03 select video_01 and follow the tutorial on mapping video to re map your missing image.