MOST IMPRESSIVE! How interesting, to this old, tuba playing Badger, that she makes her embouchure off center, to her right. She certainly can honk a trumpet!
You know it's the exact kind of thing a music master would obsess about and ignore how brilliantly that kid can play the damn thing as he/she forced her to change the mouth part. Or as you say, embourchere.
If it works for her, let her play that way! But as a trumpet player, she will never know something us Sousaphonists know well. As Jean Shepherd, another Sousaphone player once noted, while marching with your Sousaphone, if you head into a strong enough head wind, the Sousaphone plays you!
she would blow right away. She's almost a stick. She's older now and has a certain gravitas....