Multi user video chat appli using c#

Hi, I am creating a chat application with video conference facility I created application like this i have a server application in one system from different systems client appli's will be connected to server appli then chatting begins i send the message from client to server then server sends that recieved message to all the clients which r connected to it, it's working fine, i have done this using socket programming. in the same manner i need to send the video stream from client sys to server and server should send that recieved video stream to all the clients connected to it please help me in sending video stream to server and then in sever should send it to all of it's clients