Finally making good on its promise to venture into video, Spotify has launched its first-ever documentary chronicling Metallica’s beginnings. The series, Landmark — Metallica: The Early Years, comes in four parts, the first of which you can watch now on YouTube. To see just how the greatest metal band in history came to be, though, you’ll apparently have to watch the rest on Spotify. But there’s a catch: The doc can only be streamed on iOS and Android mobile devices for now and is available exclusively in the U.S., U.K., Sweden, and Germany. (Sorry, Danish fans of Lars.) But it’s free!