Seoul is the third-most-surveilled city in the world. The camera density stands at 237.76 cameras per square kilometer, according to the data provided by Comparitech. (The first and second countries are China and India, respectively.)
It’s a word that refers to a surveillance camera in Korea. Koreans call them CCTVs. If you carefully look around Seoul, the capital of Korea, you can find TONS of surveillance cameras everywhere. The purposes vary. Run by the government and the private firm, they catch over-speeding cars, check traffic, look out for the public in general, and see if there’s anyone throwing trash in a place where you’re not supposed to.
Something called ‘BLACK BOX.’ It’s a small camera attached to a car, usually to the rearview mirror. Most cars have a black box that records things that happen in front of them.
(You might’ve seen a thriller K-drama where a detective is struggling to seek clues for a murder case, and then he later notices that there’s a car with a black box recording the whole murder scene.)