So, the obvious question: isn't this just, um, a carbon copy of Vine, the video app launched by Twitter earlier this year? Ha ha ha welllllll yes, it is pretty much exactly the same, except Instagram is an app used by 130 million people a month, and Vine has maybe a tenth that many. And Vine has had trouble; apparently a stream of videos isn't the easiest thing to grapple with, and Vine is often buggy or slow to load. Instagram videos could be almost three times as long as Vine videos--how is Instagram going to deal with that? "We have to figure this out," Instagram's CEO told The Verge.