1. A method for playing a video on a screen of a computing device, the method comprising: detecting a gesture on the screen of the computing device for setting a region comprising at least one object included in the video that is playing on the screen of the computing device; identifying a plurality of frame sequences sampled from the video in response to the detected gesture, wherein the plurality of frame sequences comprises the at least one object; enlarging the at least one object in response to detecting a motion of the at least one object included in the region; and playing the video comprising the plurality of frame sequences that includes the enlarged at least one object on the screen of the computing device.