I don't understand a lot of what you are writing but there is no way to completely hide a cable if you don’t want to mess the walls (unless if you have a furred ceiling or floor). A tip is to glue (by silicon or something) the cable and follow the path where the wall meets the ceiling or the floor, and then paint it on the same colour. There are also some plastic cable pathways that you might use but they don’t look too nice in a house. If you don’t want any of these consider a wireless CCTV solution.