This paper describes an automated system for injecting advertisements into audiovisual content streams played on physical digital media, such as DVDs and Blu-Ray Discs. The system can include a display, audio/visual receiver, and a playback device. By controlling the playback device, the system can (i) replace existing advertisements with new advertisements; (ii) add new advertisement content to the content stream by pausing the content stream; (ii) add new advertisements to the content stream by buffering the content stream; and (iv) remove the existing advertisements by automatically skipping through the existing advertisements