I've heard of this 'arc of beauty' before
Anyway, beauty is mathematical and based on proportions and symmetry. There is a site/paper somewhere where they calculate the ideal proportions to create this overlay mask. I think the people who are 'subjectively' beautiful fall very closely into these proportions but have an one exaggerated feature. Everyone else - no, it's not that subjective
Models tend to have very similar features - strong and high cheekbones, strong gonial angles, stong mandible, full lips, arched eyebrows, smallish nosewomen), and 'correct' proportions in facial height, width and positions of features etc etc
Will watch the vid when I am back in my flat, because it's Friday and I'm at the pool smoking shisha