The included camera is rigidly mounted to the module that plugs into the motherboard. As long as you can move/orient the motherboard to point the camera at your point of interest, this will work.
A USB camera can work, although you may have to re-compile the kernel with a configuration that enables the UVC USB camera support and the specific sensor modules depending on whether your USB camera needs that additional support. This is not that hard, but requires a working Ubuntu 16.04 computer with 40 GB of free hard disk or more. (Not virtual machine, but booting from USB will work.)