Only display local playlist controls in header on pages with videos

youtube/templates/base.html

@@ -93,6 +93,7 @@
                     </div>
                 </form>
 
+            {% if header_playlist_names is defined %}
                 <form id="playlist-edit" action="/youtube.com/edit_playlist" method="post" target="_self">
                     <input name="playlist_name" id="playlist-name-selection" list="playlist-options" type="text">
                     <datalist id="playlist-options">
@@ -172,6 +173,7 @@
                         sendData();
                     });
                 </script>
+            {% endif %}
         </header>
         <main>
 {% block main %}