When looking at getting a CCTV inspection you need to make sure you're paying for an inspection and not a survey. An inspection is where put a camera down the drain to check the integrity of the drainage system, a survey is a document that is coded and saved on to data system to keep your drainage records up to date. However, a survey is not need for a private drain.
Private or Shared Drain? - Don't forget your water company covers shared sewer systems.