That is the title of a new Quartz piece by Ashley Rodriquez. Here is one bit:

Five hundred million hours may not sound extraordinary compared to the 1 billion hours of YouTube people watch per day. But it equates to about three movies for each Netflix subscriber—or, an astonishing 57,000 years worth of continuous viewing.

What were humans doing 57,000 years ago? Not watching Netflix, that’s for sure. It was the Stone Age and cave paintings didn’t even exist yet. The earliest known cave paintings were believed to be around 40,000 years old (paywall), although there are older known sculptures and engravings.