Hi Jixipix,
What you're looking for is generally called "Remote Access". A quick google will turn up several different solutions that may be of use to you. I've personally used www.logmein.com in the past, and found it very useful. All you need to do is install a program onto the CCTV PC, and then you can view the screen of this computer right inside the browser of any other computer with an internet connection.
This is outside of our general scope of support, so if you encounter any issues with this, we'd be unable to help - but I trust the information I've given is of some use
I trust this helps, and if you have a spare moment, please take some time to fill in a short
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Jon
eForum Team