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/multiRegionHelp.html src/hg/htdocs/goldenPath/help/multiRegionHelp.html
index 2e956bc1a2a..83feade034c 100755
--- src/hg/htdocs/goldenPath/help/multiRegionHelp.html
+++ src/hg/htdocs/goldenPath/help/multiRegionHelp.html
@@ -259,75 +259,75 @@
         
 <a name="Videos"></a>
 <p>
 </p>
 <h2>Videos</h2>
 
 <a name="ExonOnlyVid"></a>
 <p>
 </p>
 <h3>Video demonstration of Exon-only mode</h3>
 <p>
 
 </p><p>
 <!--#if expr="${SERVER_NAME} = /-china/" -->
     <a href='../../../videos/mNEJBOkf_Gk.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="315" src="https://www.youtube.com/embed/mNEJBOkf_Gk?rel=0"
     frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture"
     allowfullscreen></iframe>
     &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
     Visit our
     <a href="https://www.youtube.com/channel/UCQnUJepyNOw0p8s2otX4RYQ/videos"
     target="_blank">YouTube channel</a>.
 <!--#endif -->
 </p>
 
 <a name="CustomRegionsVid"></a>
 <p>
 </p>
 <h3>Video demonstration of Custom Regions </h3>
 <p>
 </p><p>
 <!--#if expr="${SERVER_NAME} = /-china/" -->
     <a href='../../../videos/ht4sGj1Tlxw.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="315" src="https://www.youtube.com/embed/ht4sGj1Tlxw?rel=0"
     frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture"
     allowfullscreen></iframe>
     &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
     Visit our
     <a href="https://www.youtube.com/channel/UCQnUJepyNOw0p8s2otX4RYQ/videos"
     target="_blank">YouTube channel</a>.
 <!--#endif -->
 </p>
 
 <a name="HaplotypeVid"></a>
 <p>
 </p>
 <h3>Video demonstration of Haplotype Substitution using Multi-Region</h3>
 <p>
 
 <!--#if expr="${SERVER_NAME} = /-china/" -->
     <a href='../../../videos/0lKYdqQus0I.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="315" src="https://www.youtube.com/embed/0lKYdqQus0I?rel=0"
     frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture"
     allowfullscreen></iframe>
     &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
     Visit our
     <a href="https://www.youtube.com/channel/UCQnUJepyNOw0p8s2otX4RYQ/videos"
     target="_blank">YouTube channel</a>.
 <!--#endif -->
 </p>
 
  
 <a name="Examples"></a>