Perspectives Overview

Hi, I love your Perspectives videos here:
https://www.w3.org/WAI/perspectives/

Unfortunately I can't get them to go full screen.

Issues:

   1. In Chrome, the "Enter full screen" button doesn't work with the mouse.
   2. In Firefox, the "Enter full screen" button works intermittently with
   the mouse -- it works if I click on it while the flashing "Enter full
   screen" message has flashed OFF.
   3. In IE 11, the "Enter full screen" button works only if I double-click
   it.
   4. For all the above browsers, if I do manage to trigger the "Enter full
   screen" button (either with the mouse or keyboard, the video image does not
   get any larger.


By the way, I'm using Windows 7.

John