title: html : iframe not showing content in html
body: <p>I want to show a youtube video in html 4. For that, I am using iframe. But the content of iframe is not showing.</p>
  <pre><code>&lt;iframe frameborder=&quot;1&quot; width=&quot;420&quot; height=&quot;345&quot; src=&quot;https://www.youtube.com/watch?v=C8kSrkz8Hz8&quot;&gt;&lt;/iframe&gt;
  </code></pre>
  <p>FYI: I am using Firefox 29.0 and Chrome 35.0. Both browsers are showing the same result.</p>