diff --git a/_pages/about.md b/_pages/about.md
index f37f134..9ba5284 100644
--- a/_pages/about.md
+++ b/_pages/about.md
@@ -230,7 +230,7 @@ Recognition and Sentiment Classification". [&nbsp;<a href = "http://ir.hit.edu.c
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       <p>
         <strong>Data</strong> and <strong>Knowledge</strong><br/>
-        <iframe width="560" height="315" src="https://www.youtube.com/watch?v=YgAkbbxNY1o&list=PLzIZxnJJT7ORSBnYrXJMYBVnYeLryJtl7&index=8" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>
+        <iframe width="560" height="315" src="https://www.youtube.com/embed/YgAkbbxNY1o" frameborder="0" allow="autoplay; encrypted-media" allowfullscreen></iframe>
       </p>
       <p>
         Lecturers: Hannah Brown, Nic Wong, Yixi Ding, Yuxi Xie, Liangtao Lin, Khay Liang<br/>
@@ -243,7 +243,6 @@ Recognition and Sentiment Classification". [&nbsp;<a href = "http://ir.hit.edu.c
         [&nbsp;<a href="http://bit.ly/cs6101-t2310-w07-scribe">Scribe Notes</a>&nbsp;]
         <br/>
       </p>
-      </p>
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