"She just goes a little mad sometimes. We all go a little mad sometimes. Haven't you?" - Psycho
The reason it is unexplained is because we don't know exactly where the video was shot, what the history of the castle is or anything.
The owner says it was taken in a place called Glenndunnoch Castle in Scotland. Our researchers haven't yet gotten the story on it, but it tugs at our hearts.
Scotland has a stormy past. Its rich heritage, wonderful countryside and incredible castles makes anything from Scotland (as well as Ireland or Wales, for that matter) worth watching even if it isn't real.
Many American's have roots in that part of the world, even if it was generations back. It's fascinating to imagine being there and get a chance to experience our "Old World" haunts . .. pardon the pun.
This is also unexplained because of what you see in the footage itself. See what you think.