acl QUERY urlpath_regex cgi-bin \?
の\?は削っておく。acl nekoneko url_regex -i s-clb[0-9]+.smilevideo.jp
no_cache allow nekoneko
maximum_object_size 512000 KB
refresh_pattern -i s-clb[0-9]+.smilevideo.jp 14400 20% 43200 override-expire override-lastmod reload-into-ims ignore-reload
とこんにゃ感じで、GEにゃらkh.google keyhole.comあたりを指定すれば効くはず。