@animathias: Opera just needs to support H.264 in the <video> element of HTML5. There is a bit of infighting between browsers on which codec to support. I don't know where Opera falls on that. I know firefox is afraid of the consortium that controls H.264 charging a fee in some distant future, so they only support oggs offshoot video codec.
Unrelated to browser support: now I don't have to change my user agent to "iPad", or click the "download" link when I want to watch videos on the site anymore! Yaay