Which directory or path is video camera data sent to in Android?

I've asked this question a couple of times previously elsewhere online and haven't received a reply, so here goes....

Can anyone tell me the file, directory or path in an Android device that camera data would be sent to from an external video camera that is connected via WiFi or Bluetooth (like a WiFi enabled GoPro camera, or a Bluetooth connected Looxcie camera)? What about a an external webcam that is connected to the phone/tablet via USB?

I would like to use this directory or path as a video source for a video encoding app. Is this possible, and if so would the device need to be rooted to gain access this folder?