User blog comment:Sarah Manley/ Product Update - Video/@comment-13301-20120319221642/@comment-1725121-20120319223121

"Refactoring is a technical process that changed the underlying code for videos so that it is more MediaWiki friendly. The current way we handle videos was a custom namespace hack which doesn’t work well with MediaWiki. It is not searchable, has bad file history and just all around a bit clunky." - read this.