The vertical video takeover is here

This is The Stepback, a weekly newsletter breaking down one essential story from the tech world. For more on all things vertical video, follow David Pierce. The Stepback arrives in our subscribers' inboxes on Sunday at 8AM ET. Opt in for The Stepback here. How it started For a while, every social and media platform had its own identity. YouTube was for clips of TV shows and movies, and the home of so many members of a burgeoning creator community. Instagram was mostly pictures. Netflix was…