HTML5 Fake Fullscreen Video with VideoJS

I'm trying to watch html5 video in fullscreen , without fullscreen request.

Something like that: http://ift.tt/2e5tgEY

This works but i am trying that with video.js because , i need to watch rtmp live stream..

Another question : how can i put video element without know video size ?

(i already tried put width="auto" and height="auto" but nothing changes.)

How can i solve that ?