title: Some embed iframe html youtube videos are working but some videos are working. Why? And how to solve it?
body: <blockquote>
  <p>Some embed iframe html youtube videos are working but some videos are working. Please Give me solution.</p>
  </blockquote>
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html&gt;
  &lt;body&gt;
  
  &lt;embed width=&quot;420&quot; height=&quot;315&quot;
  src=&quot;https://www.youtube.com/v/_Yhyp-_hX2s&quot;&gt; 
  
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>