I could see NLP having some merit in principle, though I again would not go so far as to say the intensity shown in the video is at all realistic. Most people in that same situation would take a figurative step back, having noticed all of the oddities in the hosts behaviour, and this never happened with the guy. It did appear like he was transfixed to a degree, and I'm not sure NLP has anything to do with such a state, though I really don't know much about it to be honest.
For myself, I have noticed for along time how I sometimes act differently around different people. Person A I might be more reserved around than person B, and for awhile I thought perhaps it was psychological, situational, having more to do with those experiences I had around that person, or my perception of them and their expectation wrt my own behaviour than anything, and this I'm sure plays into that. However, over time I quickly realized that I go so far as to actually steal other peoples manourisms, vocab and expressions, completely unconsciously, and I think everyone does this to a degree without realizing this. Even now, I sometimes laugh the same way as a friend of mine does, which is like really terrible (it really is a bad laugh) and honestly regret leeching it, but it's there and I somehow integrated it into my own behaviour.
Continuing in this vein, I think this may be a contributing reason why many people in the past have considered me easy to get along with, though I know when females say that it's likely for other reasons, and of course, I am pretty laid back so this all should be considered. However, having picked up these behavour patterns from people I socialize with, I'm sure they do find it easier to speak with me, to me and understand me if I'm using a similar verbal and non-verbal set they do, as people tend to like that which they can relate to (music, movies etc). Insofar as that goes, I could see at least on a very superficial level how this may infact "work", but again, unless there is a trust, unless there is that time to observe and know how to relate, unless there is a wanting by someone to like that present the person is giving in the first place, all these things will work against the NLP session.
It is interesting and I will do more thinking / reading about it this week. Btw, I think the secret of successful NLP is subtly, if there is a secret, especially if a person is very firmiliar with your behavour and speaking pattern enough to notice discripencies, which of course will again work against what you're trying to do (ie, like the last sentence of your previous post). I am aware that as soon as you say something like, "it's okay, you don't have to believe me", especially to a compassionate individual, they will usually respond with something like "no no, I believe you" just for the sake of not hurting your feelings or whatever, but I don't know how this plays into NLP, and I don't know how convincing they are about this to themselves for that matter. I sometimes do this, being the empathetic type myself, but it need not necessarily mean I am at all being honest and truthful.