I have been playing a little with QtWebkit (Trying to expand my skill set)...

I have managed to get a simple web browser working, and the HTML 5 score on html5test.com is 309, which is respectable.

However, when I try and watch a youtube video I get the following error for most content :

"Your browser does not currently recognize any of the video formats available."

Some videos, it will try to play but I get no visual, just audio...

Any ideas?