User blog comment:Xean/New ways to showcase Video/@comment-4018164-20121106184729/@comment--20121106194354

MediaWiki does not support & render all HTML5 elements. Some tags defined in HTML5 would be rather risky to have on a publically editable site, which is why anchor tags () have never been rendered in MediaWiki software, because they are inherently abuseable in security and vandalism areas. So no, Wikia & MediaWiki in general will not render as a tag. You can see what HTML tags are currently supported by reading this page on Wikimedia's META site.