I started with a set of U-Best VCD's. A set of 54. There are mpeg files on the disc that I simply copied over and renamed. I've imported them into CompuHost and every once in a while I sub one of the VCD karaoke files for a regular because the videos can be strange and or amusing. Like someone else said, the MPX button works fine with video files too and it reverts back when the track is over.
CompuHost seems to get stuck at the end of a video file and not display the host screen until after the next regular karaoke file is played.
I have to say, I've seen some of the ugliest sweaters on earth in those videos.