Why does embedding act sporadically?
 

I tried to embed a video in this post:
http://www.tfproject.org/tfp/showthr...44#post2405644

But it doesn't take.

It seems to here, though:
<embed src="http://therealnews.com/permalinkedembed/mediaplayer.swf" width="450" height="320" allowfullscreen="true" flashvars="&file=http://www.therealnews.com/media/trn_2008-01-15/margolisrussiafeb15_300.flv&height=320&image=http://www.therealnews.com/media/trn_2008-01-15/margolisrussiafeb15.jpg&width=450&frontcolor=0xdddddd&backcolor=0x000000&lightcolor=0xffffff&largecontrols=false&autostart=false&link=http://therealnews.com&linkfromdisplay=true" />

Why is that?

This happens a lot. What am I missing?