Default USB Webcam attached to nexus

I have to make video of a demo we are doing at my work. I would like to use my nexus 10, BUT I would like to attach a webcam that I ahve via usb to it. I want to do this so it is easier to set up the camera without having to figure out a way to balance the nexus on something.
I have a microsoft lifecam that I want use.
thoughts?