Q: if it is wireless, does it need to be plugged in?
A: Yes , wireless only means no wires going from the camera to the recorded.
Q: where does the video record ?
A: you need to have a recorder, or upgrade the unit to include a built in recorder (Additiona cost ,See upgrades)
Q: Can I view this from my cell phone or pc.
A: No, you will need a unit that inlcudes the software and proper receiver (Internet Viewable Nanny cam Here)