From then on, the majority of YouTube's videos that can support no-Flash streaming will play inside a strikingly similar video player. You'll need to sign into a valid YouTube/Google account and then head to /html5 and click the 'Join the HTML5 beta' link at the bottom.
That's all well and good, but what about your lunchtime YouTube fix? If you're using Chrome or Safari on any OS, or Internet Explorer with Google's Chrome Frame installed, you can actually view most videos in their native H.264 format, streaming straight to your browser, through the magic of HTML5.
