political ( most countries dont like others signal if they havnt got differnt plity), transmitting media (cable, satellate, microwave optical fiber etc), video system ( ntsc, pal, scam etc)
of cause the simple way is through this internet. little fee, only but slow.
I've never tried another country, but if it's within the country I know that you would need the CCTV to be connected to an always online computer which has a static IP address. Once you have the static IP address, just input the address into Internet Explorer or run the software (that came with the CCTV Digital Video Recorder card) from a remote location i.e. your home, office, laptop, etc.
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Pray as if everything depended upon God and work as if everything depended upon man. - Francis Cardinal Spellman (1889 - 1967)