How do I detect when my user is watching a video (from an external source as well)
<p>I'm looking to implement a point system like the one on <a href="http://www.khanacademy.org/" rel="nofollow">Khan Academy</a>, and I don't know how to detect when my user is watching a video. </p>

<p>I'm using jQuery &amp; ASP.NET. The videos are not hosted on my server and come from various sources.</p>
