An apparatus includes: a communication interface configured to communicate with an external device which is configured to provide video data; a user interface configured to control based on a user input; a processor configured to process the video data, which is received in the communication interface, to be displayed as an image on the display; a controller configured to perform control to extract a text for a plurality of respective processing regions which are set up to have a plurality of same coordinates as a designated region with regard to each video frame based on the processed video data after a point of time in response to a partial region being designated by the user interface within a displayed video frame on the display, and apply a preset process to the extracted text in sync with each video frame.