Strange creatures captured on surveillance camera in Fresno

In my search for strange things seen in Fresno, I came across this video on YouTube. It's of a surveillance camera located somewhere in Fresno (not sure where, I'm trying to find out). In the video, you see two strange figures walking across the field of view of the camera. I honestly don't know if it's supposed to be a ghost, alien, or something else. But it's plain weird. Unfortunately the video isn't the original, but a recording someone filmed at a conference.