It's called a number of things:
Automatic Plate Recognition, Automatic Vehicle Identification , Car Plate Recognition, Automatic Number Plate Recognition, Car Plate Reader, and Optical Character Reader.
The video was sent to me by Stan and is from the Integrated Municipal Provincial Auto Crime Team (IMPACT) in British Columbia. There are numerous police agencies in the United States that have begun using and training on this technology.
Automatic number plate recognition is an optical character recognition technology that reads auto license plates at speeds up to 100 mph and about 60 reads per minute. It links into a system that networks numerous law enforcement agencies that cross-references the databases searching for offenses. In most interviews I have heard, the officers interviewed say it's only used to locate criminals with felony warrants.
Companies selling this technology advertise claim:
You be the judge. Don't believe me. Look this stuff up.
"The imaging function of the software identifies license plates and compares them to the database and can grant access for permitted vehicles, identify stolen vehicles or track vehicles to confirm their route."
In Texas, we are to be double taxed through the new toll road system. To apply that tax, the Texas Department of Transportation is utilizing this technology to auto-toll people as they drive. Take a look at one of the TXDOT documents here.
Here's another interesting site: http://www.licenseplaterecognition.com/
I encourage you to pursue finding out more about how it is being applied in your community.