Soooo many lines. One of my uncles actually worked on one of those early, massive computers here at UW. I had always assumed that the internet was almost entirely a military innovation. It looks like a lot of net development was largely for strategic reasons in the case of nuclear war, but the potential for such a technology was a huge incentive for commercially interested companies to develop more efficient ways to connect consumers. It was interesting to see how the four smaller networks which were mentioned (ARPAnet, RAND, NPL, CYCLADES) combined to form the bigger picture. You can definitely see how important it was to lay down some sort of protocol to get all the smaller networks to be compatible in a larger scheme.
The animation style of this video reminded me of a humorous animation about social networks: