Explicitly load videos

In some cases the browser won't begin loading when the src attribute is set. We'll call load() to ensure that the intention to preload the video is explicit.

Author: joelfillmore

PxLoaderVideo.js

@@ -53,6 +53,7 @@ function PxLoaderVideo(url, tags, priority) {
         self.bind('error', onError);
 
         self.vid.src = url;
+        self.vid.load();
     };
 
     // called by PxLoader to check status of video (fallback in case