US Patent 9814977 Supplemental video content on a mobile device

Methods, systems, devices, and software are described for providing supplemental content for display on a mobile device. In one embodiment, a system includes a video display that displays video content. A mobile device with an integrated display may track the video display, with a video camera or other methods, and identify the video content in the tracked video display. The mobile device may access supplemental content related to the identified video content, and display the accessed supplemental content on the integrated display.