Sound: Some microphone distortion around the 1:05-1:15 mark, which then goes clear then back to distortion (different takes I'm assuming). A few other spots where the mic is too close to the mouth; maybe get a pop filter for it or try having it a bit farther from your mouth when recording.
Animation: mouth sync seems spot on. The waving arms are a bit out of place; they seem to spin oddly on a fixed axis which makes the movement less natural. I know you're pumping these out twice a day, but maybe slowing down to fine tune a few things would help improve the animation quality from a 2-3 star range to a 3.5+.
Keep it up.