Video Overlays from Choice Slides are designed to work specifically with ProShow Producer (All Versions), but can be used in any other program that accepts these video files. 
A separate Alpha Only file is included to be used as a mask so your images will be seen underneath.

The video specifications are:

WMV file type: Windows Media

Length: 12 Seconds, fully loopable

Dimensions: 1280x720 (Widescreen)

Format: Square Pixels.  No more NTSC or PAL...we're all one happy family in the Digital World!