I think he was playing PUBG or something.
Basically a non-Nintendo game at the time.
Its weird theyd stop live streaming just in the off chance some idiot says something stupid that they feel would then be connected with their game. Amidst all the PDP uproar I had no idea at all what game he said that shit on, it was irrelevant. Just annoying Nintendo want to keep such a ludicrously tight leash on their content, content theyre even making money on and have a huge influence over since they can obviously revoke a particular YTers account whenever they want. Seems like overkill thats detrimental to the company itself and more importantly its fans.