The present invention is directed to a technique capable of preventing resources from being wastefully used due to continuous reproduction of video data which cannot be viewed by a user as the video data does not exist in a display range of a window or preventing the user from missing the video data. A CPU of a video transmission apparatus determines whether a reproduction frame of video data during reproduction is within a display range of a window. As a result of the determination, if the reproduction frame is not within the display range, the reproduction of the video data is stopped and a reproduction position is stored.