A method of controlling a mobile terminal, the method comprising: outputting, via a display of the mobile terminal, a first video; detecting, via a controller of the mobile terminal, an occurrence of an event on the mobile terminal; and automatically displaying or not displaying a first language caption corresponding to the first video in response to the detected event, wherein the event comprises an activation of an application different than the first video being displayed, characterized in that the displaying comprises: determining whether the application includes a video and/or audio output; maintaining the displaying of the first video if it is determined that the application does not include a video output, wherein a first control panel for controlling the first video is displayed with a second control panel for controlling the application and wherein the second control panel disappears if it is not manipulated for a prescribed duration in order not to interrupt the first video watching; outputting an image of the application by interrupting the displaying of the first video if the application includes a video output, and displaying the first language caption on the image of the application, interrupting an audio output of the first video and outputting an audio output of the application if the application is determined to include audio output. outputting, via a display of the mobile terminal, a first video; detecting, via a controller of the mobile terminal, an occurrence of an event on the mobile terminal; and automatically displaying or not displaying a first language caption corresponding to the first video in response to the detected event, wherein the event comprises an activation of an application different than the first video being displayed, characterized in that the displaying comprises: determining whether the application includes a video and/or audio output; maintaining the displaying of the first video if it is determined that the application does not include a video output, wherein a first control panel for controlling the first video is displayed with a second control panel for controlling the application and wherein the second control panel disappears if it is not manipulated for a prescribed duration in order not to interrupt the first video watching; outputting an image of the application by interrupting the displaying of the first video if the application includes a video output, and displaying the first language caption on the image of the application, interrupting an audio output of the first video and outputting an audio output of the application if the application is determined to include audio output. determining whether the application includes a video and/or audio output; maintaining the displaying of the first video if it is determined that the application does not include a video output, wherein a first control panel for controlling the first video is displayed with a second control panel for controlling the application and wherein the second control panel disappears if it is not manipulated for a prescribed duration in order not to interrupt the first video watching; outputting an image of the application by interrupting the displaying of the first video if the application includes a video output, and displaying the first language caption on the image of the application, interrupting an audio output of the first video and outputting an audio output of the application if the application is determined to include audio output.