CCTV video signal and coaxial cable

[wishmegood 0]

Hi all, from the article below: http://stamhost.com/aloa/article_video_signal.htm, and based on the knowledge linked as follow: http://www.anixter.com/AXECOM/AXEDocLib.nsf/(UnID)/50D0B4C23C7D301286256F5E006048EB/$file/coax_101.pdf#search=%22coax_101%22

could we conclude that the video signal actually run the outter side of core of a coaxial cable? Thus, we actually need a coaxial cable that is with CCS for core is sufficient for CCTV system? And percentage of braid coverage is helpful on reducing noises from environment only?

Thanks.

[VST_Man 1]

translated; use solid copper core with 95% copper braid.