diff --git a/source b/source
index 9141255be27..cee04e6d1d0 100644
--- a/source
+++ b/source
@@ -30149,7 +30149,7 @@ interface <dfn>HTMLMediaElement</dfn> : <span>HTMLElement</span> {
        then the load failed.</p></li>
 
        <li><p><i>Failed with elements</i>: <span>Queue a task</span> to <span>fire a simple
-       event</span> named <code data-x="event-error">error</code> at the <var>candidate</var> element.</p></li>
+       event</span> named <code data-x="event-source-error">error</code> at the <var>candidate</var> element.</p></li>
 
        <li><p><span>Await a stable state</span>. The <span>synchronous section</span>
        consists of all the remaining steps of this algorithm until the algorithm says the
@@ -35990,7 +35990,8 @@ dictionary <dfn>TrackEventInit</dfn> : <span>EventInit</span> {
 
      <td><code>Event</code>
 
-     <td>An error occurs while fetching the <span>media data</span>.
+     <td>An error occurs while fetching the <span>media data</span> or the type of the resource
+     is not supported media format.
 
      <td><code data-x="dom-media-error">error</code> is an object with the code <code
      data-x="dom-MediaError-MEDIA_ERR_NETWORK">MEDIA_ERR_NETWORK</code> or higher. <code
@@ -36237,6 +36238,33 @@ dictionary <dfn>TrackEventInit</dfn> : <span>EventInit</span> {
 
   </table>
 
+
+  <p>The following event fires on <code>source</code> element:</p>
+
+  <table>
+
+   <thead>
+    <tr>
+
+     <th>Event name
+
+     <th>Interface
+
+     <th>Fired when...
+
+   <tbody>
+    <tr>
+
+     <td><dfn><code data-x="event-source-error">error</code></dfn>
+
+     <td><code>Event</code>
+
+     <td>An error occurs while fetching the <span>media data</span> or the type of the resource
+     is not supported media format.
+
+  </table>
+
+
   <p>The following events fire on <code>MediaController</code> objects:</p>
 
   <table>