5709a7858d5c197721be66d5218a79124abadb70
lrnassar
  Tue Mar 17 08:46:31 2026 -0700
Adding alt text to images across static documentation pages, CGI headers, markdown docs, and Pandoc templates. Content images receive AI-generated descriptive alt text; decorative images (icons, spacers, toggles) receive alt="" per WCAG best practice. Also adds Image Descriptions section to the accessibility page, and fixes Pandoc Lua writers to output alt attributes. 67 files, covering help docs, news archive, ENCODE pages, portal pages, and session examples. refs #37254

diff --git src/hg/htdocs/goldenPath/help/hgSessionHelp.html src/hg/htdocs/goldenPath/help/hgSessionHelp.html
index 53eb4d9cf11..54611ac1748 100755
--- src/hg/htdocs/goldenPath/help/hgSessionHelp.html
+++ src/hg/htdocs/goldenPath/help/hgSessionHelp.html
@@ -269,31 +269,31 @@
   may require a long time to upload. Once uploaded, click the <button>Go</button> button on the next page to view
   your custom tracks in the Browser. You will still be able to save and share your Sessions 
   online, which will include your Browser Settings and Custom Tracks. This feature is solely for 
   backing up Custom Tracks as files. 
   </li>
 </ul> 
 
 <!-- === Creating a session - Video Demonstration================ -->
 
 <a name="CreateVid"></a>
 <h2>Creating a session &mdash; video demonstration</h2>
 
 <p>
 <!--#if expr="${SERVER_NAME} = /-china/" -->
     <a href='../../../videos/d5rHBLXwraM.mp4'>
-    <img src=../../images/videoIcon.png></a>
+    <img alt="" src=../../images/videoIcon.png></a>
     &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
     Visit our <a href="/videos/" target="_blank">Video Page</a>.
 <!--#else -->
 <iframe width="560" height="350" src="https://www.youtube.com/embed/d5rHBLXwraM?rel=0" 
 frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" 
 allowfullscreen></iframe> </p>
 <p> Visit our <a href="https://www.youtube.com/channel/UCQnUJepyNOw0p8s2otX4RYQ/videos"
 target="_blank">YouTube channel</a> for more videos.
 <!--#endif -->
 </p>
 
 
 
 <!-- =====Opening a Saved Session======================== -->
 <a name="Create"></a>