Adding YouTube bbCode

$pattern = array('#\[b\](.*?)\[/b\]#s',
                     '#\[i\](.*?)\[/i\]#s',
                     '#\[u\](.*?)\[/u\]#s',
                     '#\[url\]([^\[<]*?)\[/url\]#e',
                     '#\[url=([^\[<]*?)\](.*?)\[/url\]#e',
                     '#\[email\]([^\[<]*?)\[/email\]#',
                     '#\[email=([^\[<]*?)\](.*?)\[/email\]#',
                     '#\[item=([^\[]*?)\]#',
                     '#\[youtube\]http://www.youtube.com/watch\?v=(.*?)\[/youtube\]#s',
                     '#\[color=([a-zA-Z]*|\#?[0-9a-fA-F]{6})](.*?)\[/color\]#s');

    $replace = array('<strong>$1</strong>',
                     '<em>$1</em>',
                     '<span class="bbu">$1</span>',
                     'handle_url_tag(\'$1\')',
                     'handle_url_tag(\'$1\', \'$2\')',
                     '<a href="mailto:$1">$1</a>',
                     '<a href="mailto:$1">$2</a>',
                     '<a href="http://www.wowhead.com/?item=$1">$1</a>',
                     '<object width="425" height="350"><param name="movie" value="http://www.youtube.com/v/$1"></param><embed src="http://www.youtube.com/v/$1" type="application/x-shockwave-flash" width="425" height="350"></embed></object>',
                     '<span style="color: $1">$2</span>');