hacking media code to allow for 2nd id variable

[caliman]

I would like to hack the media bbcode function to allow for a 2nd $id variable in order to support livestream. Any suggestions? Here is the function:

    public function renderTagMedia(array $tag, array $rendererStates)
    {
        $mediaKey = trim($this->stringifyTree($tag['children']));
        if (preg_match('#[&?"\'<>\r\n]#', $mediaKey) || strpos($mediaKey, '..') !== false)
        {
            return '';
        }

        $mediaSiteId = strtolower($tag['option']);
        if ($mediaSiteId == 'youtube')
        {
            // youtube iframe embed bug workaround
            $mediaKey = str_replace('/', '', $mediaKey);
        }
        if (isset($this->_mediaSites[$mediaSiteId]))
        {
            $embedHtml = $this->_getMediaSiteHtmlFromCallback($mediaKey, $this->_mediaSites[$mediaSiteId]);

            if (!$embedHtml)
            {
                $embedHtml = strtr($this->_mediaSites[$mediaSiteId]['embed_html'], array(
                    '{$id}' => urlencode($mediaKey),
                    '{$id:digits}' => intval($mediaKey)
                ));
            }

            return $embedHtml;
        }
        else
        {
            return '';
        }
}

Here are livestream URL variations:

http://new.livestream.com/Mission31Main/events/3039691

http://new.livestream.com/account/8635998/events/3039691

Thanks in advance for any help here.

caliman