coax is 200 meter maximum ,if you want more than 200 meter(video transmission) you can even use cat 5 cable with video transmitter and receiver adapters and it will be the cheap and best way.
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BNC
BNC Connector
BNC connecter
Thinnet 10BASE2 cable
The maximum distance of 100BaseT, also known as Fast Ethernet, is 100 meters using twisted-pair cable. Beyond this distance, signal degradation can occur, affecting network performance.
The maximum length of a 1000 ft Ethernet cable for network connections is 328 feet.
325 feet
The maximum length of a cat 5 e cable with out a repeater is 100meters
50-ohm
Router having maximum bandwidth in network. and in network fiberoptic cable having max bandwidth for data travaling
100 meters or 328 feet
10BaseT is another name for co-axial cable. It has a maximum cable length of 185 meters or 607 ft.