Preg_match - potrzebne wyrażenie regularne

Witam, mam pewien problem. Posiadam kod zrodlowy ze strony megavideo.

function previewplayer()
{

  window.open('previewplayer/?v=1KKAQN4V&width=' + ewidth + '&height=' + eheight + '&image=ca5bc7c36cfc8f9b7c81c4b835feaf43',name,'width='+(ewidth)+',height='+(eheight)+',scrollbars=no,status=no,resizable=y$

}

function setembedcode(cwidth,cheight)
{

  document.getElementById('embedcode').value = '<object width="' + cwidth + '" height="' + cheight + '"><param name="movie" value="http://www.megavideo.com/v/1KKAQN4Vca5bc7c36cfc8f9b7c81c4b835feaf43"></para$

}

Oczywiscie interesuje mnie ten moment: "http://www.megavideo.com/v/1KKAQN4Vca5bc7c36cfc8f9b7c81c4b835feaf43".

Chcialbym go wyciagnac, a ciecie stringa odpada, bo kod zrodlowy zmienia sie. Pomoze mi ktos?

Z gory thx.

if (preg_match('%http://www\.megavideo\.com/v/[^"]+%i', $subject, $regs)) {
	$result = $regs[0];
} else {
	$result = "";
}