Thanks for sharing the video. She obviously has insight.
I had a relationship with someone I can only classify as a "textbook" narcissist. One of the first signs I noticed was if I challenged him, even in a small way, a dark cloud of shutdown appeared on his face. It was actually frightening to witness.
I very nearly lost everything I own due to that relationship. In my aftermath, recovery, I did a lot of research, taking 3 years being alone trying to understand what/with whom, I had been involved.
The narcissist if very good at "mimicking" genuine emotion. Seductive, and skilled at getting what they want from people. They feel nothing. They suck the life out of you.