a bit more background on the video:
http://www.thisislondon.co.uk/news/a...4?source=Metro
apparently it's well known that the castle is haunted.
from
http://en2.wikipedia.org/wiki/Hampton_Court_Palace
Queen Catherine Howard was arrested there in 1542 and is said to have run along the Long Gallery screaming for King Henry VIII to save her, before his guards caught her and dragged her away. Her ghost is said to haunt the Palace, too, still screaming in the same hallway.