A snippet of BTS’ soon-to-be-released album, “Arirang,” was unveiled Friday. A sliver of animated film set in the 19th century shows seven young men gathered in front of a gramophone, which winds up to play the Korean traditional song “Arirang.” They then cross the Pacific Ocean, recording and singing songs before the backdrop switches to BTS on stage, awashed in its signature color, purple. The final scene has the seven members standing tall in front of Gwanghwamun, where they are set to hail t