Instagram is announcing a big push into longform horizontal video, which the platform is calling “Features.” Instagram boss Adam Mosseri has been against doing longform video on the platform “for a long time,” he says in a six-and-a-half-minute video (here’s the widescreen version) with VP of product Tessa Lyons, saying that “one of my concerns has been, how do we make sure that we keep Instagram not just about entertainment, but about connecting with friends.