Here’s a doco by a sceptical academic, a professor of sociology, exploring widely hypnosis, hypnotherapy and the some of the research. The hypnotherapy approaches shown are fairly old fashioned, lacking the more advanced interactive uses of psychology and counselling that we use to strengthen the hypnotic effects. These days we combine Cognitive Behavioural Therapy (CBT), Neurolinguistic Programming (NLP), Strategic Psychotherapy and mindfulness and reinforced by hypnosis that helps ensure long term chng embedded into your habits and lifestyle. The Functional Magnetic Resonnance Imaging (fMRI) research is interesting, about the different between imagining with and without hypnosis. There has been a lot more research since this was made.