1) Watch the video. It makes no claims to that being the case. Furthermore, that does not happen in any sanctioned exorcism. If that does happen, it's outside of orthodoxy and should be prosecuted by law.
2 & 3) It's hard to make valued judgements against the people partaking in this unless we know the full story. Having said that, I've worked with churches that partake in this practice. I'd be willing to bet the church is a non-denominational, Pentecostal church. They state that the church is non-denominational in the story, and from my experience, the exorcism presented was that of the Pentecostal tradition. Should this be the case, and I believe it is, it follows these following rules:
a) You can't perform an exorcism unless the person readily agrees to it. No demon can be cast out unless the person agrees to it.
b) Rituals include specific prayers, fasting, and the laying on of hands for the deliverance ceremony.
..Among other things. Again, if the exorcism was followed like it should have in Pentecostal/Christian traditions, absolutely no violence would have been, or should, be initiated against the person involved - the whole point is to make them better, and not damage them.
Back from the dead, I'm afraid.
