Continuous video to play while using Video SL

While playing a video set, I want a movie or some other video to continuously play in the background for when i mix to a non-video assigned MP3. This would be useful to play your entire library (videos and MP3s) and not need to worry about a black screen when no video is assigned. The movie would keep playing without starting from the beginning every time for non video/video assigned file.

Also this feature would be useful to play an set MP3s with a movie continuously playing.
This would make getting started with Video DJing much easier.

This would be cool to run club adverts in the background when music video is not playing such as drink prices, upcoming events etc...