In addition to the regular stream and stories, Instagram now also offers videos up to an hour long (that's for high-follower accounts; typical accounts are limited to 10 minutes) as part of what it called IGTV. Instagram, which now has over a billion active users, tapped some "influencers" to make its initial batch of IGTV content, which includes things like cooking shows and general lifestyle blogging. Interestingly, the platform is designed to show video that vertically fills your phone's screen. Will it kill widescreen? Probably not, but here's a nerdy deep dive into the history of video aspect ratios just in case.