It looks like they screwed up the turn and got closer to the ridge than planned. We don't necessarily have the thrust or energy to pop over a ridge if the turn goes bad, so that leaves bank. The jet keeps flying, and if they did overbank, they brought it back pretty quickly. Better to overbank than be a smoking hole in the side of a mountain. Keep positive g and everything stays where it's supposed to on the back. 60 degrees of bank at 300AGL is routine in the -17. I don't see a straight line correlation to the Alaska crash, unless the overbank was intentionally planned/flown and the crew was hotdogging for the camera. Funny how the opinion of this event (OMG overbank Q3 the crew and ground them) is so different than the KC-46 landing halfway down the runway way off centerline (eh just a debrief item, stabilized approach is for dummies).