Change how fullscreen works

[JeDaYoshi]

Currently, when using WebRTC, the video object is being fullscreen'd, but at the cost of using mouse/keyboard controls, showing up normal

Personally, I think it'd be better if the whole page was the one being fullscreen, then just making the video tag take all of the page. This could also allow more things in the future, like showing up chat in top of the video (obviously, not in a bad way that will interrupt the experience) and such.
This would also allow for to be used in these cases, for example, with Aperture, and if we integrate more stuff in the future.