When someone is pouring out their Spirit essences 0⁰ into the soulful music like this with such intensity that she does wear she's doing a circular breathing and holding that no that's that's God that she's communing with God right there
It goes without saying that Doreen Ketchens is a world class musician, but my man on Souza also playing kit!?! That must be exhausting and the tone he manages to get out of, what looks like a fiberglass or plastic bodied sousaphone, is wonderful. That's one way to make sure your bass and drums are in perfect time😉
When I played trumpet as a child I was taught a technique called circular breathing where you use the air in your mouth to play while breathing in through your nose. I'd imagine it's roughly the same for clarinet, maybe a bit more difficult.