Why would he think that nonbinary people exist? What about anything he's ever said, done, or dog-whistled about ever suggested that he was the kind of person who believed in or gave a shit about anything but the simplest wrong answer to any question?
My only critique of this video is this isn’t so he can own the media, he’s straight up telling his base he’s going to ban trans people in public.
That “I only know if two genders” remark means revoking non binary passports, not recognizing non binary drivers licenses, and banning them from change rooms and public washrooms. That’s what the US is doing right now, and he’s parroting the same line because he sees Trump just won and is getting everything he wants.