Board Thread:Support Requests - Getting Technical/@comment-3362361-20170622123640/@comment-9605025-20170622141711

Unfortunately not. The only external source that Wikia supports is Flickr. You could use MediaWiki's default external source behaviour but then you won't be able to control the size and whatnot.

Also, for this type of forum, you don't need to sign your posts. That is already done for you.