title: Does the metadata preload attribute on html 5 loads the entire video?
body: <p>When using html 5 <code>video</code> tag, does the <code>preload="metadata"</code> attribute load the video already? I'm a bit concerned about the performance issue on page load is should the video size be greater than 100MB.</p>
  
  <p>I notice that when having this attribute, an image of the very first second of the video is loaded but does not exactly play the video.</p>
  
  <pre><code>&lt;video width="320" height="240" controls preload="metadata"&gt;
    &lt;source src="movie.mp4" type="video/mp4"&gt;
    &lt;source src="movie.ogg" type="video/ogg"&gt;
    Your browser does not support the video tag.
  &lt;/video&gt;
  </code></pre>