Seoul Metro's labor union launches work-to-rule slowdown protest causi… ArirangNews 0 10 11.20 22:06 https://www.youtube.com/watch?v=CtcooKdyI8k + 0 https://www.youtube.com/feeds/videos.xml?channel_id=UCzznO4xSV8BKnUBPy… + 0 Seoul Metro's labor union launches work-to-rule slowdown protest causing rush hour delays