Abstract: A server includes: a video data acquiring unit configured to acquire video data in which a game is imaged; a storage configured to store the video data; an image determining unit configured to determine whether or not target image data, which is data of a target image indicating an advertisement client, is included in the stored video data; an advertisement setting unit configured to generate, when the target image data is included in the video data, advertisement setting data at a time when video based on the video data is displayed in an external display, the advertisement setting data being to be used for displaying, in the external display, an advertisement of the advertisement client corresponding to the target image; and a communication unit configured to be capable of sending the video data and the advertisement setting data to outside.

Abstract: A tag for theft prevention is provided for decreasing the porion covering the inside of a container case as much as possible while being capable of carrying out detection without being affected adversely by a recording medium. The tag for theft prevention includes a detecting circuit which is positioned at the circumference edge of at least one of the sides of a container case in the thickness direction of the recording medium and is capable of detecting electric waves.