With "stand alone" is meant a camara you can use without suplier software (at home or in the cloud).

I just want a camera that I can use with motion. (unify has local software, but still you need their software as far as I know)

The only reason why I hesitate to recommend Ubiquiti cameras is even their cheapest offerings are kind of expensive.

And although you can run isolated from the Internet, managing updates is a bit painful. (Ask me how I know)

I think they mean a cam that doesn't need to be plugged in through usb to work, like an ip camera.