“How do we define failure when it comes to motion pictures?” Simultaneously defending the more-or-less rehabilitated Heaven’s Gate and the not-so-much The Lone Ranger is a hard task, but presumably someone has to do it. In this video essay, Scout Tafoya gives a surprisingly plausible stab at arguing that both are underrated slabs of greatness with much in common, alternately grimly realistic and expensively glossy takes on the genocide of the Native Americans, presentational flip sides of the same coin.