on the original page (which I find now only in the google cache)
Windows Media Player HTML5 Extension for Chrome
The Windows Media Player HTML5 Extension for Chrome is an extension that enables Chrome users to play H.264-encoded videos (aka MP4) on HTML5 pages by using the built-in capabilities found in Windows 7.
Requires Chrome 8.0 or later
We are working on getting the extension submitted to the Chrome store, for now you can install the extension following these instructions:
1. Download the extension from here (right click and "Save Link As...") and save it on your local machine.
2. in Chrome, select the Chrome menu/tools/extensions.
3. Drag&Drop the extension file on the extensions page. Chrome will ask you to install the extension.