Can u see the security camera through your PC?
If yes,and u don't have 2 video outputs, get graphic card with two outputs(almost all have and it does not have to be HDMI, anything like VGA, DVI display port,S-video will do too - u can buy reduction adapter if needed for few $).
Connect second monitor or TV and use it with video driver suite example: ATI(AMD) have Catalyst control. Use extended desktop. and there it is...