I feel like you must have seen it given that you're working on this but just in case, the AlphaGo Documentary (2017) was quite good. I bet you'd enjoy it.
I actually haven't seen it. I need to. At first I didn't want to know too much about go strategy or how other programmers have attacked the problem because I wanted a sort of naive untainted view of things. Which was easy for me, because I'm not much of a go player. Now I'm pretty much roped in to what I'm doing, so I should watch that documentary. I'm playing around. The AlphaGo devs are the real deal.