Method of playing video using handheld display device

A method of playing video using a handheld display device having an image sensor, a transceiver and an opaque touch-sensitive screen, said method comprising the steps of:

• overlaying said display device on part of a printed substate, said printed substrate containing a printed content associated with a video
• imaging an area of the printed substrate and generating image data using the image sensor;
• determining interaction data using said image data, said interaction data identifying a page description corresponding to the printed substrate;
• sending the interaction data to a computer system, thereby causing the computer system to identify the page description, and retrieve display data and video data associated with said printed content;
• receiving said display data and said video data from the computer system;
• displaying, on said opaque touch-sensitive screen, display information matching and aligning with said printed content underlying said screen such that the opaque screen has real-time virtual transparency through the screen to the printed content underlying said screen from a user's perspective to provide a virtual window to the printed content underlying said screen;
• displaying, on said opaque touch-sensitive screen, playback controls icons for controlling playback of said video;
• and
• playing, on said opaque touch-sensitive screen, said video based on said video data when said user interacts with one of said playback control icons.