Video display device and control method

A video display device wearable on a head of a user, comprising:

• a video display capable of switching a frame rate of a video displayed thereon;
• a controller programmed to designate the frame rate for the video display;
• a first sensor that detects a movement of the head of the user;
• a second sensor that detects a movement of a line of sight of the user;
• and
• a motion determination processor programmed to determine a motional state of the user of the device based on an output from the first sensor and an output from the second sensor,
• wherein the controller is further programmed to instruct the video display to change the frame rate according to a result of the determination made by the motion determination processor such that, in a case where the motion determination processor determines that at least one of the movement of the head or the movement of the line of sight of the user is detected, the frame rate of the video displayed on the video display is made larger than a case where the motion determination processor determines that the movement of the head and the movement of the line of sight of the user are not detected.