[blueblisters]

It can be a) very expensive b) also very difficult to implement.

Video understanding is an active field of research and I'm not sure state of the art is there yet for capturing nuance like engagement potential, categories etc.

[wombatmobile]

State of the art where? College? Silicone Valley? Bangalore? Shanghai? Beijing? Hangzhou?

[blueblisters]

State of the art in academia, which is largely location agnostic.