Ouija Board: What moves the planchette?

Below is a video by National Geographic on the ouija board.

The ouija (/ˈwiːdʒə/ WEE-jə), also known as a spirit board or talking board, is a flat board marked with the letters of the alphabet, the numbers 0–9, the words “yes”, “no”, “hello” (occasionally), and “goodbye”, along with various symbols and graphics.

It uses a planchette (small heart-shaped piece of wood or plastic) as a movable indicator to indicate a spirit’s message by spelling it out on the board during a séance.

 

So what moves the planchette?  Is it really spirits from beyond?  Ghosts of our loved ones, demons, gods?  Some religions consider the ouija board to be occult and dangerous and have even banned their followers from using it.  Is it really dangerous?  Who are we reaching out to with the ouija board?

Watch the video clip below and find out.