‌Miller, 23, fell from the park's El Capitan on Wednesday. Article continues belowTiktoker Eric Kufrin said he was the "sole witness" and inadvertently livestreamed the incident. In a video posted on Friday, Kufrin said he was watching from El Capitan Meadow when Miller fell. “I’m his bigger brother but he was my mentor.”Miller grew up in Alaska, climbing with his brother and father since his childhood. His brother said, “He has inspired so many people to do things that are perhaps unthinkable, including myself.