In Skyrim You Never Know Who's Watching

I recorded this a while back while playing the Dawngaurd DLC for Skyrim and forgot to upload it. Anyways as a Vampire Lord going through the side quest lines given by your fellow vampires you'll eventually come across one that will send you to the Dawngaurd Castle and after the massacre I began to loot the castle but I saw something moving so I approached slowly and this what I saw.