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/hgTablesHelp.html src/hg/htdocs/goldenPath/help/hgTablesHelp.html
index 1c4d1947f06..c530acd11f8 100755
--- src/hg/htdocs/goldenPath/help/hgTablesHelp.html
+++ src/hg/htdocs/goldenPath/help/hgTablesHelp.html
@@ -1008,91 +1008,91 @@
 <h3>Table Schema</h3>
 -->
 
 <!-- === Video using Table Browser  =========== -->
 <a name="Videos"></a>
 </p><p>
 <h2>Video examples of Table Browser queries</h2>
 <p></p> 
 
 <!-- === list of genes =========== -->
 <a name="listOfGenes"></a>
 <h3>Finding a list of genes in a genomic region</h3>
 <p>
 <!--#if expr="${SERVER_NAME} = /-china/" -->
     <a href='../../../videos/RjB_N1GpT0U.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/RjB_N1GpT0U?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>
 
 <!-- Getting codon sequences -->
 <a name="codonSeq"></a>
 <h3>Obtaining coordinate sequences for a gene exon</h3>
 <p>
 <!--#if expr="${SERVER_NAME} = /-china/" -->
     <a href='../../../videos/6JoUqM1iKxQ.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/6JoUqM1iKxQ?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>
 
 <!-- === SNPs in a gene =========== -->
 <a name="snpsInGene"></a>
 <h3>Finding all the SNPs in a gene</h3>
 <a name="Videos"></a>
 <p>
 <!--#if expr="${SERVER_NAME} = /-china/" -->
     <a href='../../../videos/Y_cQ3JkhsUQ.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/Y_cQ3JkhsUQ?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>
 
 <!-- === SNPS upstream of genes =========== -->
 <a name="snpsUpstream"></a>
 <h3>Finding SNPs upstream of a gene</h3>
 <p>
 <!--#if expr="${SERVER_NAME} = /-china/" -->
     <a href='../../../videos/ZqxlBF3vqhY.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/ZqxlBF3vqhY?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>
 
 <!--#include virtual="$ROOT/inc/gbPageEnd.html" -->