Abstract: A method for data communication between a data processing unit (12) and an end device (20) to be used by a user is provided, which method comprises an analyzing step according to which a content to be displayed on a display (22) of the end device (20) is analyzed and wherein the content to be displayed is chosen by the user, previously. Further, a data set (16), in particular a video data set, stored in a storage (14) of said data processing unit (12) is chosen according to the result of the analyzing step. The data set (16) is transferred to the end device (20) which data content is displayed on the display (22) of the end device (20). Further, a system (10) and a method for calculating charges is provided.