Allow multiple video types to make X-Browser compability a success!

First of all thanks a lot for this great module. We're using it successfully but had a big problem:
Videos don't work in many browsers if you don't provide several video types!

Videojs describes these video types in the "Get started" Tutorial.

It makes a lot of sense to make them available in the input filter this way:
[videojs:{x.mp4,y.webm,z.ogv}]

I'll attach a patch and the resulting .module file.