$url = 'http://www.youtube.com/watch?v=iuBs31NuAvc';
preg_match('/watch\?v\=([A-Za-z0-9_-]+)/', $url, $key);
echo 'Image: http://img.youtube.com/vi/' . $key[1] . '/default.jpg';
echo '<br />';
$data = file_get_contents($url);
preg_match("#<title>(.+)<\/title>#iU", $data, $t);
echo 'Title: ' . $t[1];