I just watched it on B4, to which they have called them Samanda as well
Watch it again, because you can see that Amanda near falls of the bed, the lap on Sam's right falls off, and Amanda puts her hand over her month when it does, plus they both fall of that thingy they are bouceing on
Over all it's a very funny, cute video. And the song is so catchy, I can see kids singing it walkingdown the road
Plus they don't take it serouisly which is even better