gistfile1.html

<markdown>
  A whole bunch of markdown formatted text
</markdown>

<a href="..." title="..." name="..."></a>

<video class="(right|left|centered)" src="http://youtube.com/link/to/video/page" width="600" height="350">This is a caption</video>

<image class="(right|left|centered)" src="..." large-src="..." href="..." credit-url="..." credit="...">This is a caption</image>

<code language=""></code>

<liveblog id="" />

<quote class="pullquote"></quote>

Valid plain HTML (not attributes):

<h1> through <h4>

<p>

<ul>, <ol>, <li>

<strong> -- <b> converts to this

<em> -- <i> converts to this