The Queen's Handbag and canon

I was considering making articles on subjects seen or mentioned in this short (Queen Elizabeth II, Conflagration Spell, Buckingham Palace, etc.) but I'm not sure if this is considered canon or not. Our articles on Augusta Longbottom and Neville Longbottom's grandfather both mention events from this short, and there's an article on fanged gerbils, but the article on the 1940s relegates the "fanged gerbil incident" to a mere footnote in the BTS section. I don't see why this should be considered any less canon than the video games or that Page to Screen book (which, as an aside, I'd really like to get my hands on someday) aside from the numerous contradictions.

tl;dr Can I make articles on things mentioned in this short or not? -- 1337star (talk) 02:12, November 10, 2011 (UTC)