Wordpress shortcode example

functions.php

function my_video($atts){
	  extract( shortcode_atts( array(
        'src' => $atts['src'], 
        'poster' => $atts['poster'],
    		), $atts ) );
      $html='<div class="video_wrap">
        	<video id="movie" poster="'.$atts['poster'].'" preload="none" controls=""">
        		<source src="'.$atts['src'].'" />
        		<source src="'.$atts['src'].'" type="video/webm; codecs="vp8, vorbis"" />
   			<source src="'.$atts['src'].'" type="video/ogg; codecs="theora, vorbis"" />
        	</video>
        </div>';
 return $html; 
}

add_shortcode('video', 'my_video');