I like to think the music playing was recorded directly from the stoats brain.
I love stoats.
They looks like super cute little sock-puppets, and will war-dance and perform acrobatics (like in the video)
But also they are utterly vicious turbocharged killers. They'll take down prey 10 times their own weight (eg run after a rabbit until it becomes exhausted, then jump on its back and chew through its spine), or go on killing sprees where they just kill way more rodents than they can every possibly eat (in that case they just eat the brains)