Computers behind some types of NATs can't use peer-to-peer video: http://en.wikipedia.org/wiki/Traversal_Using_Relays_around_NAT http://en.wikipedia.org/wiki/Tr

Computers behind some types of NATs can't use peer-to-peer video: http://en.wikipedia.org/wiki/Traversal_Using_Relays_around_NAT http://en.wikipedia.org/wiki/Traversal_Using_Relays_around_N...