World of Tomorrow by Don Hertzfeldt [video]

(Lowercasing title to follow HN guidelines)

I find this video fascinating in how many topics Don is able to cover in just over 16 minutes, from time travel [paradoxes], to classism, romance, loss, thoughts about life and death, and the elimination of the human race. Combine this with the innocence of explaining factual details to a child who doesn't understand any of the concepts -- and an almost heartbreaking ending.