I'll add a little detail in case anyone has other ideas! I am doing a musical (Working) and part of it is to show some videos. I have taken a picture of a local factory window, a 3 window pane with some brick molding around it. These windows will appear for most of the musical. However there are 3 scenes where I will have taken these windows, made the glass part a green screen, and am playing a video or picture slide show in part of the window. So the effect is I have my brick and window frame but now my glass area is a video screen.
What I am trying to accomplish is to seamlessly play a video of just the regular brick and window glass. (Or display an image if it will look the same). Then start my slide show video (which has 5 seconds of the standard brick and window and fades to slide show as part of this video) , then play the regular brick and window glass video/image again.
This will happen 3 times in the musical and the brick and glass screen will be on most of the time other than 1 fade to black.
My theory is I setup all of my videos and when it is time to play the slide show, double click and it starts playing and no one knows the difference, other than seeing the slide show.