hoffentlich klappt es

s/item.tpl.html

@@ -60,6 +60,15 @@
   <script type="text/javascript" src="./s/jquery.timeago.js"></script>
   <script src="./s/theme.js"></script>
   <script src="./s/video.min.js"></script>
+  <script src="./s/videojs.persistvolume.js"></script>
+  <script>
+  (function() {
+    var my-video = videojs('my-video');
+        my-video.persistvolume({
+            namespace: "f0ck"
+        });
+  })();
+  </script>
   <script>
   $(document).ready(() => {
     var s = $.timeago.settings;