2160x3840x8 per frame uncompressed, for 8 bit video... Even at 24fps that exceeds 1 Gbps.

So "full fidelity" means ~8:1 compression ratio? At 60 fps it's closer to 4 Gbps so ~20:1?

Not to mention 8 bit video is not great and susceptible to banding as well as in general already concidered compressed in color space even when "uncompressed".

You can probably get away with streaming it at that quality but by any of my definitions it's not close to high fidelity.