Webkit supports the .MP4 video format. This is the standard format for Chrome, Konqueror and Safari or any other browsers that are built upon the webkit architecture.
HTML5 makes it easy for Webkit based browsers to integrate HTML5 video with a few short lines of code.
Make sure to replace "yourvideo.mp4" and "yourposter.jpg" with the actual file you want to use.
It's quite simple to embed HTML5 video into Webkit browsers, just a few simple lines of code and you're done. Not too bad huh?