Thanks for this really well-explained video. I just want to point out a mistake on slide 9 (11:40): your first expression for delG-crit is missing a "4" in the surface area term. It should be "4" x (-2)^2 = 16. Thanks again.
Thank you for a very informative video; I have not studied Material Sciences but will try to apply this concept to something else that I am working on.