RTSP protocol in two lines

When we watch Video from our DVD player, we use a Remote to perform functions on this video, like Play, Fast Forward, Rewind, Stop, Pause, Jump. In technologies like Cable, IPTV, where Video is played from a Server, how do we perform al these functions. RTSP, Real Time Streaming Protocol. This is the network protocol which will take your commands like Play, Pause, Forward, Rewind to the server. That's practically it. I agree, this is more than two lines.