diff --git a/modules/ROOT/partials/configuration/media_url_resolver.adoc b/modules/ROOT/partials/configuration/media_url_resolver.adoc
index dc29fb431..a6d7a5a67 100644
--- a/modules/ROOT/partials/configuration/media_url_resolver.adoc
+++ b/modules/ROOT/partials/configuration/media_url_resolver.adoc
@@ -21,13 +21,15 @@ tinymce.init({
   selector: 'textarea',  // change this value according to your HTML
   plugins: 'media',
   toolbar: 'media',
-  media_url_resolver: (data, resolve/*, reject*/) => {
-    if (data.url.indexOf('YOUR_SPECIAL_VIDEO_URL') !== -1) {
-      const embedHtml = `<iframe src="${data.url}" width="400" height="400" ></iframe>`;
-      resolve({ html: embedHtml });
-    } else {
-      resolve({ html: '' });
-    }
+  media_url_resolver: (data) => {
+    return new Promise((resolve) => {
+      if (data.url.indexOf('YOUR_SPECIAL_VIDEO_URL') !== -1) {
+        const embedHtml = `<iframe src="${data.url}" width="400" height="400" ></iframe>`;
+        resolve({ html: embedHtml });
+      } else {
+        resolve({ html: '' });
+      }
+    });
   }
 });
 ----