Some things just hide in plain sight, but when someone points them out, you’ll never see them the same way. For example, the thematic overlap between the two major movies opening this weekend, Boyhood and Dawn of the Planet of the Apes. Both are about the maturation of a male primate. This mash-up trailer, entitled “Apehood,” by editor Nelson Carvajal, blends the two stories, and is kind of perfect and kind of very touching. Miss you, baby Caesar.