Broadcast rendered camera through networking.

You need to render the camera to the texture, then convert that RenderTexture to a Texture2D (so you can easily get PNG bytestream from it). Then transfer t$$anonymous$$s bytestream in a RPC and reconstruct a texture from it on the other device.

T$$anonymous$$s is a very simple solution, not suitable for realtime image transfer over the internet, but it could work as a guideline for what you need.