Is This a Ghost or Alien Lurking Behind a Woman in Her Living Room?

A woman in Yakima, Washington was walking around her house while doing a cell phone video chat with a friend last Friday . . . and at one point you see a mysterious figure walking around in the background.  It looks like a ghost, alien, or maybe a kid. 

She doesn't see it or know anything about it until her friend on the chat asks if there's someone else in the house . . . and she says no.