1. A computer-implemented method comprising:transmitting initial signaling data for a video conference from a signaling server over a video conference signaling channel to a plurality of client computing devices, wherein the initial signaling data comprises data needed for a client computing device to connect to the video conference;
transmitting signaling data for the video conference to the plurality of client computing devices providing identifiers to media data corresponding to a selective subset of the client computing devices;
establishing, by a media server, the video conference with the plurality of client computing devices, the plurality of client computing devices having used the initial signaling data to connect to the media server;
selectively sending, by the media server, media data to the selective subset of the client computing devices.