Using an instant message service to communicate while video-call skyping with the volume turned off. No verbal words are necessary during the conversation, but you can still see the person you're talking to.
Nick-Hey can we skypetype tonight? I wanna see you but I cant talk everyone will be asleep.
Hannah-Yeah I wanna skypetype tonight! I dont want to wake people up but I still get to see you, skype-typing is awesome!