User blog comment:Sarah Manley/Videos on Wikia/@comment-4476879-20120927213340/@comment-1613840-20120927222314

HI, So videos are actually in the file namespace. We did this a few months back as part of a refactoring project to help keep pages with them fast. All videos get tagged with Category:Video. The video namespace is just an alias of the file namespace, so if you had a file with video in the url it would work (via a redirect) but it no longer is shown in namespace dropdowns.

You are right in that videos from the Wikia Video Library can't be renamed. This is because they actually don't live on your wiki, but are just embedded there. The original file is located on the video wiki. Because this is a shared resource, we probably won't open up renaming there, since it may throw off others who are looking for the content.