It looks weird and makes strange noises - what did Mister dragging in there?
Well, let's unravel the mystery: It is a so-called "Theremin", an electronic musical instrument that is played without contact and generates noise through electrical vibrations.
No wonder the cat does not get the secret - and her view towards the end of the video is therefore at least as funny as that of the cat that then appears on the edge of the picture.