The present invention provides methods and systems for displaying a video
signal depending upon a user interaction. An example system includes a
display for receiving the video signal, at least one transmitter for
transmitting location signals, and at least three transceivers for
receiving the location signals from the transmitter and for transmitting
modified location signals. The geometric locations of the at least three
transceivers are known to a computing device. The computing device is
then able to derive a transmit location of the location signals based on
the received modified location signals, wherein the computing device is
adapted to modify the content of the video signal in response to the
derived transmit location depending upon the user interaction.