I don't understand what you're trying to do. Just get the video ID? Assuming it's PHP:
Code:
if (preg_match("/\?([\w\d]+)/", $url, $match)) {
$video_id = $match[1];
} else { echo "No Video ID"; }
You don't need that combumbulated mess of a regex.
__________________
xMarkPro -- Ultimate Blog Network Management
Streamline your marketing operations. Centralize management of domains, pages, Wordpress blogs, sponsors, link codes, media items, sales and traffic statistics, plus more!