I would advise you not to listen to that guy. He keeps coming up with ridiculous, far-fetched speculative theories that have no basis in official WoW Lore. Just listen to how he oversells it in the beginning. "I don't know if we're supposed to know this yet," he says about something that's literally just his own theory, then proceeds to make edits to the official Chronicles illustrations.
Chaos = Disorder = Fel.
Azeroth is not a titan of Fel.