User blog comment:Random-storykeeper/Tool rules/@comment-4652747-20121027203458

The way I see it, you can boil it down to:

1. No Fanart/Personal Images or videos.

2. All images/videos have to be in use on the wiki (and have a use, not just random images put on a page when it shouldn't really be there, or you're just putting it on the mainspace so you can use it on your userpage)

You don't even have to mention Nitrome. As you said, "a picture or videos' relevance to Nitrome alone does not determine whether it stays on the Wiki or not."