AMGA

AMGA, the American Mountain Guides Association, is an educational non-profit that provides instruction, guide certification, and online resources (among other materials) for climbing and mountaineering. One specific respondent mentioned the use of AMGA to review learned skills, but did not cite it as an initial source of learning. AMGA likewise includes a disclaimer alongside their videos stating, "Always seek the advice and supervision of a certified mountain guide before attempting any of the activities, techniques, or skills described herein."  AMGA, while reputable for those familiar with it, does not have the same visibility as YouTube. This low visibility is likely the cause of the sole mention among the interviewees, despite being a verifiable source of accurate content.