Someone else (maybe it was you) shared this recently on hn and I watched it and don't regret a single minute. Insanely informative and the style of presentation where one covers the history of our understanding of a topic is possibly my favorite.

That's a great video, but I think it's from 2011. I recently came across another video from 2016 which is a bit more technical and sheds some light on the results of recent research. People interested should definitely give it a watch - https://www.youtube.com/watch?v=BZbunmaU-60