Media over media

Would it be possible to add a media option to the Foreground pane?  This would be very beneficial for displaying any type of media over a background without having to create a slide presentation. For example being able to display Church Motion Graphics Pro layers on top of a motion background.  Or even displaying a picture on top of a motion background without creating a slide presentation.

This would be good, but it would be even better to be able to attach a camera! To do live streaming! Maybe even with text on top!?