Reviving an older thread, but this company is coming out with a smaller version of the TV which is still big, but closer to O scale. They are open for pre orders but I bet they’ll offer a DIY kit for the new mini screen, which would be cool.
Also, they now have it where you can stream directly from your computer, so you could play anything or even mirror your computer screen, which is cool to me.
https://tinycircuits.com/pages/tinytv2
Just thought I’d share in case anyone for last year was interested.