tip: for YOUTUBE tags, only include the part after "watch?v=" ~> only those letters and numbers.
Ive seen multiple live hypnosis shows where a dozen people volunteer before hand, and they do several scenes.
One of the main things is focusing on the therapists voice and blocking out other sounds. And ya, they always do the same breathing exercises to get you relaxed. Usually before the therapist starts talking, theres a bright light and/or calm music to focus on.