Years ago, an adventure began with a visit to your local outdoor shop and some quality time spent pouring over an array of unruly topographic maps. Today, our adventures begin by scrolling through YouTube videos to scout places we'd like to explore. Because in addition to videos about dancing pigs and how to make cute crop-tops out of old t-shirts, you'll find an abundance of adventure videos covering every bit of the globe.This week we review four of our favorite channels that cover the Sout...