The XBox Kinect uses motion sensing technology to play video games.  Can this tech also be used in ghost hunting?

Caching spirits using electronics is not new, unexplained voices have been caught on tape in a phenomena called EVP.  Can motion also be detected?  The use of a Kinect system was used as a plot device in Paranormal Activity 4.

YouTube has several videos showing unexplained people caught by the Kinect appear on screen.

In this video just one person is playing with the Kinect when a second person appears on screen.  The person appears to be a small child.

More odd Kinect videos