I do not recommend Tudor's videos, as much of it is fiction. I am not even sure if Tudor is actually a narcissist and whether he has ever done any of the things he explains in this book, but having read 25+ books on this topic, and having had actual personal experiences dealing with such people - he understands this material very well, and this is overall the best book on the topic: it's quick, accessible, and really effective at teaching you what's going on. Reading this book should be essential reading.