Use of Tabs Manager for YouTube video link with xHTML

I have been trying to update the World news template tabs module with a YouTube video. The code I am using with an example is:

<object width="290" height="218" type="application/x-shockwave-flash" data="http://www.youtube.com/v/7_6B6vwE83U">
<param name="movie" />
</object>

But it nothing shows up. Am I missing something here?

Thank you in advance!