Skype's big innovation was its ability to work in NAT-to-NAT situations, not anything to do with its actual calling functionality. People were video chatting ev

Skype's big innovation was its ability to work in NAT-to-NAT situations, not anything to do with its actual calling functionality. People were video chatting even way back in the mid '90s: https://www.sattlers.org/mickey/CU-SeeMe/internetTVwithCUSeeMe/chapter08/culture.html https://www.sattlers.org/mickey/CU-SeeMe/internetTVwithCUSee...