I saw a version of this commercial without the sneaking through the gate and most chase stuff. My first impression was, does humanity get so ignorant of the past that they are unaware of what populated the Earth 85 million years ago? After watching this version, it answered my question: yes.
Anyone who read or watched Jurassic Park or its sequels knows a Tyrannosaurus Rex eats a couple of humans for a midday snack. Maybe the idea is in 20 million years humanity is able to prevent themselves from getting wiped out by the asteroid? Seems to me if one was going to pick a time period to establish humanity, I would pick the Paleogene period when horses, bovine, and other creatures have developed and are prime for re-domestication. Mammals are much easier to tame into giving us the power to accomplish work.
Of course, I could also pick not take a sci-fi show seriously….