It's not like Nintendo reached out to Scott nor made any formal policy change. In Scott's experience, his Nintendo videos got hit with Nintendo copyright claims and lost their ads and then that just... reversed itself. "At some point during the claim, my revenue for specific Nintendo-claimed videos disappeared," he said. "The revenue then recently reappeared."
While Nintendo hasn't said any new firm things on the matter, Kotaku has come in contact with Zack Scott. He was one of the people hit with ads reversal, but it seems like things might turn around.