Great video! For anyone who doesn't want to watch a half-hour video, the 9 movement-agnostic, "Authoritarian Personality" traits that researchers identified as common among people who had engaged with or expressed support for fascistic ideologies were:

Conventionalism: 'a rigid adherence to conventional, middle-class values'
Authoritarian Submission: 'a submissive, uncritical attitude toward idealised moral authorities of the in-group'
Authoritarian Aggression: 'a tendency to be on the lookout for, and condemn, reject, and punish people who violate conventional values'
Anti-intraception: 'an opposition to the subjective, the imaginative, the tender minded'
Stereotypy: 'the disposition to think in rigid categories'
Power and Toughness: 'a preoccupation with the dominance-submission, strong-weak, leader-follower dimension'
Destructiveness and Cynicism: 'a generalised hostility and a vilification of the human'
Projectivity: 'the projection outwards of unconscious emotional impulses'
Sex: 'an exaggerated concern with sexual "goings-on"'