We each emit an unique electromagnetic (DNA) fingerprint so to speak....
It makes sense to me that they would have no need to chip each of us if they found a way, hmm, lets say through wireless technology such as cell phones and computers, satellites/supercomputers etc., to tag/target these/our DNA and electromagnetic signatures, catalog each of us, and build their data bases etc.
I think the woman in this video is even a bit behind on the current status of this technology....
All they really need to do is identify the DNA/electromagnetic signature/fingerprint is through the name on the account of the cell phone nearest to the persons body, (using GPS etc).....simple actually.