Ask HN: Share your favourite talks on YouTube

Recently I have really enjoyed:

* Joseph Stiglitz on the introduction of informational mechanisms in Economics [1]

* Burton Folsom on the myth of robber barons and the great american entrepreneurs of the 19th century.

[1] https://www.youtube.com/watch?v=s1HnxyTvSRk

[2] https://www.youtube.com/watch?v=4Vw6uF2LdZw