Okay, I think I figured it out, and sorry if I didn't explain myself correctly. I think in the past a user named @eatkinola made a theme based on your nostalgia video set that was also called Nostalgia [https://forums.launchbox-app.com/topic/41137-nostalgia/]. I think this theme used still images from your resource files, but with a transparent screen. Then within the screen, it would only play videos from your own launch box library.
I'll ask in the resource thread to see if anyone can help me insert games from my launchbox library into the television somehow. I'm trying to do it myself on Davinci Resolve, but I can't seem to figure out how to get the new videos below the reflection and drop shadow layers. I'm probably using the alpha channel wrong, but I don't really know how to do this stuff haha.
Thanks again for all your amazing contributions!