How to watch in client applications what it is happening in the server one?

Hi everybody. I'm writing here after search on Google for a while, but I still have my ideas confused.

What I've already done is an application with Unity3D that reads tracking data from a text file and move object according to this dataset with the possibility to play and pause and go back and forward in the timeline.

This is working fine.

What I'm trying to do is configuring a Network in which the computer, that reads the data and has the possibility to interact, is the server and other clients are connected, with only the possibility to watch what is happening and not to interact (I'd like that clients cannot play or pause for example). Like the clients could watch a streaming of what it's happening the server.

What I am sure of is that I have not to run on both devices the same version of application because in the client-one I only need to create the objects according to the ones that are on the server (without reading the file) and move them according to their position in the server.

I am completely new about Networking in Unity3D: I read about RPC Call, UNet, Sockets or NetworkManager but I really don't have any idea of which approach to take on this.

Hope to be helped, I'll try my best to learn about this topic! Thanks