1. A video reproducing apparatus comprising: a distance image acquiring module configured to acquire a distance image in which distance information between a user and a distance sensor are stored for respective pixels of the distance sensor; a distance-based center calculator configured to calculate a distance-based center of the user based on the distance image; a user instruction coordinate calculator configured to calculate a user instruction coordinate based on a relationship between the distance information and the distance-based center, wherein the user instruction coordinate represents a position where an instruction from the user is given; a reference plane calculator configured to set a reference plane based on the distance-based center, and calculate a distance between the distance sensor and the reference plane; a user instruction image generator configured to acquire, from the distance image, an image of the user that is located between the distance sensor and the reference plane, and generate a user instruction image based on the acquired image; an operation subject image generator configured to generate an operation subject image which is an operation subject of the user instruction image; and a display controller configured to combine the user instruction image with the operation subject image, based on a positional relationship between the user instruction coordinate and a virtual operation plane which is set at a given position from the reference plane.