He starts out with a video of a bunch of raw eggs being scrambled. And then gets to the point.
"Big History" is an important topic for us to understand if, you know, we want to stick around. But we can't understand it without having a look at the entire history of the universe. So he backs it up 13.7 billion years and goes from there. (If you're interested in the part where we come into the picture, it begins at 12:27.)