I own some restaurants. We have cameras, too. No, they don't scan customers and cars in any way. You're implying those cameras are owned by the police. You're making stuff up.
Part of the tour included a visit to their video surveillance room. There were at least a dozen LCDs each with 4 camera feeds displayed, and two volunteers watching the cameras. The majority of the cameras were security cameras installed by business owners and home owners, and they shared the feed (and often pan/tilt control) with the police.
There might not be automated scanning yet, but everything they did was recorded. Automating this in a central location (county, or state) would be relatively trivial within the next few years.
To say the police own the cameras is incorrect, but it is absolutely true to say the police HAVE ACCESS TO the cameras, and often DO CONTROL them.
I believe that person, in short.
In any case, it still does not mean it's every camera system throughout the world which would, again, be a false statement.