An electronic device with one or more processors, memory and a display receives a first request to display a first video stream and in response, displays the first video stream on the display in a first video tile and plays first audio content that corresponds to the first video stream. While displaying the first video stream, the device receives a second request to display a second video stream. In response to receiving the second request, the device slides the first video tile off of the display and slides a second video tile that corresponds to second video tile onto the display. The device also starts to play second audio content for the second video stream and increases an amplitude of the second audio content relative to an amplitude of the first audio content in accordance with an amount of the second video tile that is displayed on the display.