Original video of the "Savannah Vampire"
This video surfaced of a supposed man walking in front of a mirror and casting no reflection. The location is labeled as a flipflop store in Savannah and was videotaped off of the stores CCTV monitor. The video was 1st uploaded to Youtube in approx 2013 and has been linked to a TV show called THE HAPPENING..
The never ending conspiracy of shape shifters in power
There has been no end to the speculation of what may be occurring in the video. Is the man a reptilian shape shifter? Is he a vampire? Is he literally a Man in Black? Is he a Grey/alien? Is it just a simple editing trick that can be done on Adobe After Effects or any other professional editing program?
No Reflection, Van Helsing
Many little tidbits and questions pop up that need answers. If he was a vampire, and according to legend, they do not cast shadows, why doesn't his clothes show up in the mirror? Or does he has magical invisible clothes also? But in the 1931 movie Dracula, his clothes are also invisible in the mirror. But obviously that is a man made fiction and film interpretation. In some cultures, vampires do not have a reflection and sometimes do not cast a shadow, perhaps as a manifestation of the vampire's lack of a soul
Dracula (1931) Mirror Scene
Now if we get logical and try to look at this scientifically. The man in the video does cast a shadow, so he is solid, blocks light sources and is not a transparent ghost.
If you look closely in the mirror (the reflection), at times there is no movement, so that may indicate that editing did take place to remove the man's reflection from the mirror as he passed by.
But maybe the truth lies in the open and the most logical explanation...it is all for a TV show.
Stuart MacLeod, a known magician just may have been responsible. Here is Barry and Stuart's website . It is indeed Stuart that is the mystery man in the video.
When I dug a little deeper:
"In 2011 and 2012 they (Barry and Stuart) were part of both seasons of BBC1's "The Magicians" a live magic show drawing in over 6 million viewers weekly. They most recently made "The Happenings" four one hour specials for Watch, where the duo use their magic to fake paranormal events." 
The Happenings Splash
So yes, the answer as to what was happening here in the video is..The Happenings...it was for a TV show.
Here is a fun little video with a more detailed manipulation of the video called matteing. Captain Disillusioned will tell you more:
Rush Hour video explained by Captain Disillusioned
 Wikipedia excerpt
(Chris Chaos is a long time resident of South Jersey who once again resides in and writes from Gloucester City, New Jersey. He is a filmmaker, a business owner, writer, urban explorer and investigator of the odd and weird, a proud parent, happily taken and a connoisseur of hot wings. Chris can be reached at AxisVideo@aol.com)