Wim Hof's Cold Endurance, Breathing and Meditation Method

HN mentions it as evidence that the Wim Hof method can be learned and as the documentary that led some to try breathing and cold exposure, while others dispute the claims.

A VICE documentary profiling Wim Hof, the Iceman, covering his feats of cold endurance, his breathing and meditation method, and scientific studies of his control over his autonomic and immune systems.