A method for introducing an object with a unique identifier in a video game. A request to a server to introduce the object is made. An identity of a user of the video game is sent to the server. The server generates a token paired with the identity, embeds the token in a multimedia file, and sends the multimedia file to the video console. The video console reproduces the multimedia file and shows a message to the user so that the user executes an application in a smartphone. The application activates a reader to obtain the unique identifier of the object and activates a sensor element to be able to extract said token associated with the multimedia file. The smartphone sends the unique identifier of the object and the token to the server. The server pairs the unique identifier of the object with the identity of the user by means of the token and sends the unique identifier of the object to the video console to introduce it in the video game.