I found this article that looks promising for how to get the picture from HA to the tv: Real-Time Picture-in-Picture Camera Feeds on your TV with Home Assistant | Sean Blanchfield
I’ve Googled about and found several web pages that say side loading APKs is possible, but man would my wife be pissed if I bricked one of the TVs. Has anyone done this before? Do you have a link to the steps you followed?