I must be missing something... (it wouldn't be the first time)... but sticking gummy people through the bottom of a cupcake?? Poor gummy people. Stuffed up into the darkness of a cupcake!
Perhaps instead it could be cutting the cupcakes in half (to expose the "light") in the middle and then sticking a gummy person as though "walking" in this "light" ??
BTW: the video shows filling cupcakes from the top -- which makes sense as otherwise you'd be poking a hole in the cupcake liner thingy.