Intro is here.
Maybe "He" Bear's family routinely hides things behind grandfather clocks? And maybe "He" Bear is envisioning Christmas as small? Because Grandfather clocks are heavy and usually sit flush with the wall. So I'm guessing what's behind the clock is a few dust bunnies and maybe a hole for the mouse that is climbing up the clock.
Also, I'm enjoying "He" bear's levitating. Cool powers, man. If only you also had ESP. Then you would look in the living room and we could be done with this farce.