fix: youtube module was broken

app/modules/elementdispatcher.php

@@ -512,10 +512,11 @@ class ElementDispatcher {
                 break;
                 
             case 'youtube':
+                array_shift($request);
                 $vid=array_shift($request);
                 $pos= array_shift($request);
                 
-                if( in_array($pos,array('left','right','full'))) {
+                if( in_array($pos,array('left','right','full','center','auto'))) {
                     $class = $pos;
                 } else {
                     $class = 'left';
@@ -543,7 +544,7 @@ class ElementDispatcher {
                         $body[$k] = sprintf("<span class=\"copyright\">%s</span>",$line);
                     }
                 }
-                $new=sprintf("<div class='video-container %s'>"
+                $new=sprintf("<div class='video-container content_element_youtube %s'>"
                              ."<div class=\"media\">%s</div>"
                              ."<div class=\"caption\">%s</div>"
                              ."</div>",