1. A method comprising: receiving, by a processor, input data describing an input received by a first computing device presenting a collaborative video-conference on a first screen, the input instructing the first computing device to modify the collaborative video-conference presented on the first screen, wherein the first computing device is engaged in a video-conference with a second computing device presenting the collaborative video-conference on a second screen; determining, by the processor, an output command based on the received input data, the output command instructing the second computing device to modify the collaborative video-conference presented on the second screen; and transmitting, by the processor, the output command to the second computing device, wherein the second computing device modifies the collaborative video-conference presented on the second screen according to the output command.