Uhh, it's not perfect, but you can definitely judge a lot about a person by looking at them, from their body language. Video would be better, and of course in person would be better again, but it's not like there's no information there. It's not skull measuring to interpret body language, and some of that body language can come off in a still photo. In particular, I think I can get a pretty good read on how empathic a person is pretty quickly based on body language.