Couldn't get this to work in Chrome on OS X, suspect it has something todo with some of my extension(s) blocking needed stuff.
In addition to an "Incognito Mode" (where you might still want some extensions enabled) we really need a "No Extensions/No-(Popup)-Blocking mode" so sometimes one can enjoy stuff like this while keeping sane during normal day to day browsing.
EDIT: just watched after disabling all my extensions and restarting (yes, that was necessary) Chrome, only to realize that i'd already seen it in 2011...