MediaWiki:Gwtoolset-step-1-instructions-3/en

If your media file domain is not listed below, please [$1 request] that your media file domain be added to the list of Wikimedia Commons allowed domains list. The allowed domain list is a list of domains Wikimedia Commons checks against before fetching media files. If your media file domain is not on that list, Wikimedia Commons will not download media files from that domain. The best example to submit in your request, is an actual link to a media file.