I wonder when he considers an announcement serious enough to wear a tie? Did you notice the plain dark background (instead of the usual bunch of people moving around) which made his flapping ears very prominent. There wasn't any audience so why couldn't he just look at the cameras?
He never seems to look at the camera, he’s too busy swinging his head back and forth from one teleprompter to the other. But today he was reading from the podium rather than the teleprompter.
I believe there were reporters there as far as an audience, and he blew them off and took no questions. Gotta play golf ya know.