Ghost in the London Dungeon

Ghost in the London Dungeon is a commercial from the UK for the attraction of the same name (The London Dungeon).

The ad starts with text stating the following: The footage you are about to see is absolutely genuine and was captured by CCTV cameras at the London Dungeon. ''Look very closely and you will see a mysterious ghostly figure. The video has been thoroughly analysed by experts but they have so far offered no explanation as to what it is.''

In the next scene, there are two fuzzy separate security camera images with the words "MAIN EXT JACK ENT" on the left and "PRIS DR" on the right. The timestamp "05:59:50" and the date "20-11-04" are displayed at the bottom. The image goes fuzzy for a moment and the time advances to "10:09:43". There's also what appears to be a janitor holding a broom walking out of range of the camera on the left.

After 34 seconds, a man with long white hair, black teeth, and rags, jumps up. His face almost taking up the whole screen, and he yells "DIAAAAAAAAARG!". He pauses for a while, staring at the camera with his mouth wide open before he recedes and lies down offscreen. The following text then reads: Did you spot it?, before the logo for the attraction is shown.

The earliest upload of this on the Internet was to YouTube on January 6, 2006 by Log Bog, the creator of Stickman Screamer.

Links
NOTE : The following video contains a screamer!
 * youtube.com/watch?v=2h3hVrootIg