I agree OGM but like you said it is much the same with dressage videos- they aren't going to teach you all you need to know. I think the problem with the parelli videos is that they are put forward as being simple and easy and DIY, when no new method is really like that. If someone says to you this horse is parelli trained it is the same as someone saying this horse is dressage trained. A horse that is truly Parelli trained or truly dressage trained will be a pleasure to work with no matter what. In reality people slap labels on 'how there horse is trained' to make it sound better and then it is that system that takes a battering when the horse turns out to be a dud or difficult.