$embed_player =  '
     <table widht="300" align="center" class="tborder" >
     <tr><td class="alt1">
     <object width="515" height="300">
     <param name="movie" value="http://www.youtube.com/v/\\4&hl=en_US&fs=1&rel=0&version=3">
     </param>
     <param name="allowFullScreen" value="true">
     </param>
     <param name="allowscriptaccess"value="always"></param>
     <embed src="http://www.youtube.com/v/\\4&hl=en_US&fs=1&rel=0&version=3"
     type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true"  width="515" height="300"></embed>
      </object>
      </td>
      </tr>
      </table>
      ';

$post['message']=str_replace("http://youtu.be/","http://www.youtube.com/watch?v=",$post['message']);
$post['message']=str_replace("http://www.youtu.be/","http://www.youtube.com/watch?v=",$post['message']);
$post['message']=str_replace("http://www.youtube.com/watch?feature=player_embedded&amp;v=","http://www.youtube.com/watch?v=",$post['message']);
$post['message']=str_replace("http://www.youtube.com/watch?feature=endscreen&amp;NR=1&amp;v=","http://www.youtube.com/watch?v=",$post['message']);


$post['message']=str_replace("http://www.youtube.com/watch?feature...&amp;v","http://www.youtube.com/watch?v",$post['message']);

      $post['message'] = preg_replace('#(<a href="http://www.youtube.com)?/(v/([-|~_0-9A-Za-z]+)|watch\?v\=([-|~_0-9A-Za-z]+)&?.*?)">(http://www.youtube.com)?/(v/([-|~_0-9A-Za-z]+)|watch\?v\=([-|~_0-9A-Za-z]+)&?.*?)<\/a>#i', $embed_player, $post['message']);