This is pretty huge, check out Google Video Beta: http://video.google.com

And look at the Google Video Help Page: In order to playback video on Google Video, you simply need to have Macromedia Flash Player installed on your computer. Once installed, you will be able to playback the video from within your browser.

found on: http://www.peldi.com/blog/archives/2005/09/google_video_sw.html