Ghosts orbs caught on security camera (Las Vegas, NM)

On January 18, 2017, at approximately 5:48 pm, I was leaving work with my two young sons. I was the last employee to leave the building. My boys and I started walking down the pitch dark hall way leading toward the exit, by sons led the way with their flashlights on their phone. Suddenly, as I past an office door in the hall way, I heard very long moaning sound that started with a long low tone , increasing into a very high pitched sound ending suddenly. I turned around to see who was behind me, but did not see anyone. I raced out of the building as quickly as I could grabbing the back pack of my youngest son leading him out the door. I ran to my car and called my boss frantically, telling him I thought that there was a man in the building. My boss checked the security cameras and sent me this video. It appears that I was chased by Orbs. My building is located on the old historic plaza in down town Las Vegas, NM. This multi-level building used to be a Bank in the 19th Century and a brothel at the top level. Myself and other employees have experienced may encounters in this building with hearing voices, slamming doors, and elevator opening with no one exiting or entering the elevator. This footage was caught on tape. Infrared Secretary cameras had just been installed a few days before this encounter. Note on video times: I heard the moan at about (00:36-00:37), the possible orbs can be seen at about (00:30-00:32) going through my son in the bear hat, and then as we left multiple can be seen at about (00:44), (00:45) (00:48), (00:50) and (00:52).