Excellent first post, question we hope you will do more!!!
Any pattern CAN be called anything you wish. In precisely the identical manner which TRADITIONAL can be. If I do a thing and you copy it, we have just created technically a "tradition"....
Just because they CALL it kata, does not make it so.
Kata IMHV is a SUBTLE, nuanced thing which can be explored for a lifetime, examined and still truly not find all the "gems". Kata contain principles, and the precise mechanics of those ideas, concepts. Does this elbow form contain any of those aspects? Could you practice that form alone for the rest of you life and be content figuring out its whispers???
Unlikely I suspect...therefore doubtful it is a kata....
It is merely my opinion, I could surely be mistaken,