A device comprising: a display; an interface configured to exchange video data between the device and a network during a video call between a user of the device and at least one further user; a memory storing information identifying at least one display element each associated with one of the at least one further user; and a processor configured to run a client application operable during the call to: display received video in a first UI window on the display; detect the user navigating to a second UI window comprising one of the at least one display element; query the memory to determine a location for the display of the received video, and in response, display the second UI window and control the video received from the further user associated with the display element of the second user interface window to be displayed at a location of the display element.