This is a very interesting thread! And it reminded me of a blog I saw once.
There's this guy who manages to track down nearly impossible-to-find women from old music videos and interviews them. He even gives account of his extensive detective work in finding them. I don't know of anyone else who has the passion to do this, for the sake of recording history and gaining insight. So thanks to this guy, there's many interesting stories and histories to read about that otherwise no one would ever know.
For example, he tracked down the girls from ZZ Top's "Legs" video and did three blog posts about it.
Noblemania: The Girl in the Video: ?Legs? (1984), part 1 of 3