YES, somebody posting videos of new tricks.
We need more of that!
I believe Widowmaker is a legit new trick. Also, I don't think that the name has ever been used for a top trick. So, as far as I'm concerned, you have created and named a new trick. It's also showy, I liked it. Congrats!
I don't think a high boomerang would be a new trick. For example, we were doing them at nats last year when we were going over the high strings.