You may not be aware, but in many countries any broadcast of a hypnosis session is banned. Here is the relevant rule from the regulations [pdf] from the British TV watchdog Ofcom:
Rule 2.9 Hypnosis
Elements of the hypnotist‚Äôs routine may be broadcast to set the scene. However, it is important not to broadcast the routine in its entirety, nor to broadcast elements that may cause a member of the audience to believe they are being influenced in some way.
This is because it is perfectly possible to be hypnotised through the TV, or indeed through the radio.
There is no ‘magic’ to hypnosis, it just requires that someone relax, focus, listen to suggestions and engage with the process, and some research suggests that even the relaxing and focusing is optional.
The most important thing to know about hypnosis is that people vary in their hypnotisability and this is the single most important thing that determines whether suggestions will have an effect.
As long as they are spoken clearly, it doesn’t seem to matter how they’re presented.
In fact, one of the most widely used measures of hypnotisability in the scientific literature takes participants through a number of hypnotic suggestions to see which they can experience and is usually just run from a pre-recorded tape.
Link to ABC news ‘Nine attempted to ‘hypnotise viewers’ (thanks David!).