I did not understand what that messy pastebin was, sorry. I was expecting a simple text snippet, not a whole page of things I have to parse to understand what's in it.

I put this in a post:
[tab:MV Subbed Mirror]    <p><embed src="http://www.megavideo.com/v/PHQALQFXca839b50d7b4f1bfafbe2b2e6cf3202f" type="application/x-shockwave-flash" allowfullscreen="true" width="600" height="438"></embed></p>
[tab:Veoh Subbed Mirror]<p><embed src="http://www.veoh.com/static/flash/players/veohplayer.swf?permalinkId=v7130903G9REWFKm&amp;id=13804811&amp;player=videodetails&amp;external=0&amp;playAuto=0" allowFullScreen="true" width="600" height="438" bgcolor="#FFFFFF" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer"></embed></p>

I get this as a result:
<p><embed src="http://www.megavideo.com/v/PHQALQFXca839b50d7b4f1bfafbe2b2e6cf3202f" type="application/x-shockwave-flash" allowfullscreen="true" width="600" height="438"></embed></p>
<!--nextpage--><!--marv:Veoh Subbed Mirror --><p><embed src="http://www.veoh.com/static/flash/players/veohplayer.swf?permalinkId=v7130903G9REWFKm&amp;id=13804811&amp;player=videodetails&amp;external=0&amp;playAuto=0" allowFullScreen="true" width="600" height="438" bgcolor="#FFFFFF" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer"></embed></p>

I don't get any empty string.

The script works perfectly fine.

I'm sorry but I'm ending here the free support for something that works exactly as advertised.