SEOUL, South Korea (Reuters) — The granddaughter of Park Mak-rye, 70, now South Korea’s YouTube sensation, first uploaded videos of her five months ago on YouTube to help her preserve her memory in case she contracted dementia, which runs in the family. But they soon exploded in popularity amongst South Koreans in their 20s and 30s who are lapping up Park’s videos of her doing makeup, recreating looks of famous celebrities as well as travelling […]