"It's a way to drill down very quickly to the very specific thing you're looking for," says Spencer Cappallo, a graduate student at the University of Amsterdam, reports Mashable. They go on to clarify how videos can be condensed into emoji: "About one out of every 50 frames was analyzed...and the emoji chosen to represent those are averaged to get one short emoji list, ordered in decreasing confidence."
So, if your favorite video involves a dude getting pelted in the groin by a football, you would likely type in an emoji of a man, followed by an emoji of a football. Because, apparently, nobody knows how to use words anymore, and the future of communication lies in facial expressions and accompanying graphics to express thought. Basically, we're cavemen with high-tech phones.