In the last post, I have embedded a YouTube Video. I was suprised when I see this part of YouTube code wasn't XHTML 1.0 Valid. Thereafter you will find a somewhat easy correction.

So, instead of :

<object width="425" height="350"><param name="movie" value="http://www.youtube.com/v/aJFn9YrJIyE"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/aJFn9YrJIyE" type="application/x-shockwave-flash" wmode="transparent" width="425" height="350"></embed></object>

Use :

<object type="application/x-shockwave-flash" style="width:425px; height:350px;" data="http://www.youtube.com/v/aJFn9YrJIyE"><param name="movie" value="http://www.youtube.com/v/aJFn9YrJIyE" /></object>