As the saying goes "a picture is worth a thousand words" and being able to see the inside of the sewer line, while not always pleasant, is very valuable.
Our TV operators are able to identify problems such as root intrusion, pipeline breaks, and infiltration of ground water. Our goal with TV inspection is to identify and resolve problems before they can cause a sewer overflow.
Notice the problem shown in the last picture where a telephone cable was drilled through the sewer line. Without TV inspection, the problem would have gone un-noticed until it caused a backup.