Embodiments of the present invention provide a visual interlock system for providing product information by displaying video content annotated with virtual information (stored as metadata) such as advertisement information or a social network service (SNS) message from a friend. Specifically, among other things, embodiments of the present invention provide a system that allows a video playing on a television to be simultaneously played on a mobile device. The system searches for virtual information related to a visual object in the video. The virtual information is stored as metadata. The virtual object in the video is annotated with the virtual information. The annotated video is displayed on the user terminal.