Do not break if peer element could not be found.

static/js/services/videolayout.js

@@ -31,11 +31,13 @@ define(["jquery", "underscore", "modernizr"], function($, _, Modernizr) {
 		if (videos.length) {
 			if (videos.length === 1) {
 				var remoteVideo = peers[videos[0]].element.find("video").get(0);
+				if (remoteVideo) {
 					size.width = remoteVideo.videoWidth;
 					size.height = remoteVideo.videoHeight;
 					console.log("Remote video size: ", size);
 				}
 			}
+		}
 		return size;
 	}