simplewebrtc "stir in the webrtc objct"

How do I use real users for localVideo and remoteVideos? ~ thanks in advance

var webrtc = new SimpleWebRTC({
// the id/element dom element that will hold "our" video
  localVideoEl: 'localVideo'  ,
// the id/element dom element that will hold remote videos
  remoteVideosEl: 'remotesVideos'  ,
// immediately ask for camera access
  autoRequestMedia: true
});