This is what the professionals use when installing cameras. Weatherproof, UV resistant, RG59 Video cable.
RG59 video cable is a larger gauge video than standard pre-made cables. This also provides for a cleaner install because you can drill smaller holes since you attach the connectors after cable is in place.
You can easily cut this cable to the desired length, use a twist-on or crimp-on BNC connector, and connect the end to your camera.