Demon over the shoulder

Here's a video showing what looks like a demon over a mans shoulder, taken in Aurora at a wedding reception, the demon looks kind of like a dog.

The video at the link will give you the full story. Looks very convincing to me, it was shown to rocky mountain paranormal research society, their comments were that it was very interesting, but there was a lack of evidence to conclude much.

Cool picture, it does look like what it looks like, but other than that can you really go any deeper into it?