title: Why is my YouTube video not showing up?
body: <p>I am simply trying to have a YouTube video show up on my site, but instead I'm getting a blank shape of the video. Does anyone know why this could be or how to fix it? Thanks. Here is the portion of my code: </p>
  
  <pre><code>&lt;DOCTYPE html&gt;
  &lt;html&gt;
  &lt;head&gt;
  &lt;/head&gt;
  &lt;body&gt;
  &lt;iframe width="420" height="345" 
  src="http://www.youtube.com/watch?v=nIsCs9_-LP8"&gt;
  &lt;/iframe&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>