Small update:How would I test that msyelf?
After looking more closely at the video, I see that the IT guy doing the scanning is using a laptop with Kali Linux, and the software is called Akismet. Network engineers are certainly familiar with this.
He is also using an antenna to catch the electromagnetic signature of the people...
So a laptop with an antenna/network card and Kali Linux, which comes with Akismet out of the box I think. Gotta know how to use it though.