Render virtual window


I’m looking for a way to render out an image sequence of a virtual window like you see in augmented reality sets. Just like I saw with virtual studio you can output to different external screens like leds or projectors, I would rather capture one particular video output as a true 4k render sequence. So, I have an unreal scene with an led wall and a moving camera. I would then like that camera to see through the led wall and map that image back as an image sequence on the led wall so it seems you’re looking through the wall again. But I only need to render the camera captured texture on the screen. I tried 2D scene capture and render target but it’s not leading me to a dedicated (baked) render.

How can this be done?