So you've heard that YouTube has a new way to load videos while you're doing something else on your smartphone. You want that feature. That's the sort of feature you've been wanting forever. Ever since you first saw that your smartphone could load a 4K 60-frames per second video (or whatever you were super hyped about) for the first time and you realized it'd take an hour to buffer, you wanted the ability to load it all while you did something else. That time is now!