diff --git a/twu_moodle_course.js b/twu_moodle_course.js
index 88c1e49..826bd25 100644
--- a/twu_moodle_course.js
+++ b/twu_moodle_course.js
@@ -1,6 +1,11 @@
 $(document).ready(function () {
     $("select").change(function () {
         $(this).find("option:selected").each(function () {
+            const iframes = document.querySelectorAll("iframe");
+            iframes.forEach((videoframe) => {
+                const iframePlayer = new Vimeo.Player(videoframe);
+                iframePlayer.pause();
+            });
             var optionValue = $(this).attr("value");
             if (optionValue) {
                 $(".toggle-box").not("." + optionValue).hide();