For me it doesn't work because I have sewer soaked gloves on but I have seen others use it with 2 people working one to push the camera and the other making a report at the same time.
I pulled my toilet and used this camera to look at my sewer towards my septic tank, noticed there were a few bellies in the line where water stayed. A lot of it is under concrete. The camera worked pretty good do not know how durable it will be time will tell? So next time toilet doesn't flush well might be solids and toilet paper setting in the belly of the sewer
Video of Camera in action