At that viewing distance the pixels are probably far enough apart to stick your pinky between them. If you're ever close enough to a digital billboard you can r

At that viewing distance the pixels are probably far enough apart to stick your pinky between them. If you're ever close enough to a digital billboard you can ran your hand over it and it's like a bed of nails. LEDs on little stalks. The metric is called "pixel pitch". And there's loads of software and hardware options for running massive displays. There are some beefy PCs with like 8 HDMI outs, splitters, combiners. Or more likely you split the video into multiple segments and then use software to keep multiple players in sync.