The video player uses Silverlight, so you'll need the plug in for Windows or Mac OS.
Edit: I've decided to scrap the iframe and just have a link to the page here.
This was put together (primarily the player) with Expression Media Encoder, once I can get my hands on RTM I'll be using that for Gamercast.
Yes I know there's a big percentage thing in the middle when the video is playing and still downloading, when Silverlight supports Windows Media Server that'll go away, or when I edit it out of the player.