Use the new <video> tag to add video to your website. Provide multiple sources of video (file types) to accomodate various browsers.
<video controls="controls" width="480" height="360">
<source src="screencast.ogv" type='video/ogg>
<source src="screencast.webm" type='video/webm' >
<source src="screencast.mp4" type='video/mp4'>
Video is not visible, most likely your browser does not support HTML5 video
</video>