You may also find a lot of videos by searching for "Richard Feynman". The query "Steven Weinberg" gives you this
The woman is not necessarily the brightest person in the world - so you hear a lot of questions "so you are a physicist, right?" - "were you a physicist already several years ago?" - "and this is how you became a theoretician" and so on. ;-) But Weinberg still has some freedom to talk about cosmology. If you find some interesting videos, post them here.