Incredible amateur video captured the rush of snow and ice barreling down Mount Everest toward a camp. Nineteen people died after last month’s devastating Nepal earthquake triggered the avalanche. Jost Kobusch, the climber who shot the footage, survived and is speaking out about the near-death experience.

Tim Konrad is the founder of Unofficial Networks and a passionate skier with over two decades of experience in the ski industry. In 2006, he launched the blog from Lake Tahoe with his brother John, evolving...