It is a real thing, yes a camera on a broom is sweeping the rounds.
Meet the PutchLabs BroomCam. A cheap hardware store broom, a TV Logic monitor, a Blackmagic Pocket Cinema Camera, and a Veydra 12mm Mini Prime Lens.
PutchLabs BroomCam promo from Putchfilms on Vimeo.
Some of the hi-tech equipment I demand when shooting a major network TV shows