An electronic device with one or more processors, memory, and a touchscreen plays a first media item in a full-screen mode on the touchscreen. In response to detecting a contact on the touchscreen, the first media item shrinks into a region of the touchscreen and continues to play in the region, while a new media item is displayed outside of the region. In response to detecting movement of the contact, the shrunken first media item moves away from the region and the new media item moves into the region.