Deskscapes for Windows 8 only works with one video

I have upgraded to the Windows 8 version of Deskscapes. Unfortunately it only works with the included 'woman in the red blowing skirt' video.  If I try to use any other video, even those saying Windows 8 ready, it simply opens another video over the skirt video, but only covers about two-thirds of the screen.  In the upper left corner. Both videos are active.  Thanks for any help!