Depot Ghost Video?

We think this film might be real evidence of a ghost in a train depot. It was filmed in Duluth, Minnesota. The description of the ghostly movement is described by the owner of the video, below...

"If you look at the bottom of the windows on the back wall of the traincar, you will see what looks like the top of someone's head move from right to left. When it reaches the left side of the glass, it will suddenly be taller, move back and forth a bit and then manifest back into an orb and jet off to the left. We are able to account for everyone in the building...it was no living person that moved in front of these windows...the bottom of the glass is 7 feet off of the ground anyway!"