Not all coaxial cable should be used for CCTV camera installations. RG59 coax cable is the industry standard and best choice for CCTV systems and HD over coax systems, however, not all RG59 is created equal.
This is what you need to know. Be sure to select RG59 cable with a solid copper core / inner conductor and 95% copper braiding.
RG6 can also be used for CCTV. It is also available with a solid copper core / inner conductor and 95%copper braiding. RG6 can be run farther distances than RG59 without video loss, however, RG6 is a thicker, more rigid cable which is not as convenient to work with (especially around corners). RG59 is rated at 700 feet and RG6 is rated at 1000 feet for analog CCTV. RG59 is more typically used.