Cacher is the code snippet organizer for pro developers

function html5_video( $atts, $content = NULL ) {
	extract( shortcode_atts( array(
		"src"    => '',
		"width"  => '',
		"height" => ''
	), $atts ) );
	return '<video src="' . $src . '" width="' . $width . '" height="' . $height . '" controls autobuffer>';
}
add_shortcode( 'video5', 'html5_video' );
Now you can use the following shortcode in your post:

[video5 src="http://example.com/videos/your-video.mp4" width="720" height="480"]