@ Ben Mathews
These robocams have high resolution cameras with ultra bright headlights on them. The heads are capable of rotating completely around without tangling their launch cables. There are some robocams that can fit through 6" pipe as well as some monsters designed for 48" and 60" pipe. High resolution is needed as they inspect seams and cracks so that the repair crew can come back later and repair the breaks.
They actually collect a great deal of data during a session, and most good systems are tied into a GIS system. A great deal of technology goes into maintaining the sewer systems, our last truck cost us $250,000.