Launch video on clients at the same time

Hello, i want to launch at the same time a video in all the clients (60 android mobiles ) trough one server (pc) in a local network over wifi, and i am a little lost on how to start this with the new Unity Networking, with the old networking i would make the pc host and send rpc to clients to start that video at the same time, can anyone please help me with the new system?, thanks.
Best regards.
Jesús.