title: how to block website from loading in iframe?
body: <p>Recently i tried to load youtube website in an iframe, but i checked that it's not worked. i used this simple code.</p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html&gt;
  &lt;head&gt;
  &lt;title&gt;&lt;/title&gt;
  &lt;/head&gt;
  &lt;body&gt;
  &lt;iframe width="1000px" height="700px" src="http://www.youtube.com" &gt;&lt;/iframe&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <ol>
  <li><p>i want to know , why my webpage can't load youtube website in
  iframe..</p></li>
  <li><p>what code i use to load the youtube website in my webpage.</p></li>
  <li><p>how i use same techniq in my website, so no one can add my website
  in iframe.</p></li>
  </ol>