126.96.36.199 Request to Change Playback Position
This event occurs when the higher layer wants to start streaming from some specific position in the content.
If the value of the State variable is READY, this event MUST be treated the same way as a request to start streaming, which is specified in section 188.8.131.52.
If the value of the State variable is PLAYING, the client MUST first request the server to stop streaming, as specified in section 184.108.40.206. Once this has completed, the client MUST request to start streaming at the new playback position, as specified in section 220.127.116.11.