Heads Up Display
as window to times past in this world.
I almost like the "interact with the video" idea - though see there's a stronger idea lurking in the world we see in the frame, behind the glass.
What would you have different there? For example, a color changing deck is just what happens when you look through the frame rather than directly.
Of course there is one possible universe where it's your named card face up in the pack.
In that other world quarters are made of copper.
Shows what will be there in ten minutes from now.