The method envisages that groups of articles to be packaged, arranged orderly with a lateral narrowed dimension oriented in the forward movement direction, are fed along a feeding line. Utilizing the communication connection, the content receiver may control the entertainment system component in order to synchronize user interfaces the content receiver is operable to provide with user interfaces the entertainment system component is operable to provide. A video selection unit selects the video or the video section to be played based on a classification result and the degree of user’s concentration on the video.