public static function renderYoutube($vars)
{
$vars += array('h' => null, 'id' => null, 'list' => null, 'm' => null, 's' => null, 't' => null);
$html='<iframe width="560" height="315" allowfullscreen="" frameborder="0" scrolling="no" data-s9e="" src="//www.youtube.com/embed/'.htmlspecialchars($vars['id'],2);if(isset($vars['list']))$html.='?list='.htmlspecialchars($vars['list'],2);if(isset($vars['t'])||isset($vars['m'])){if(isset($vars['list']))$html.='&';else$html.='?';$html.='start=';if(isset($vars['t']))$html.=htmlspecialchars($vars['t'],2);elseif(isset($vars['h']))$html.=htmlspecialchars($vars['h']*3600+$vars['m']*60+$vars['s'],2);else$html.=htmlspecialchars($vars['m']*60+$vars['s'],2);}$html.='"></iframe>';
return $html;
}