1. A computer-implemented server comprising: a communication unit: transmitting instructions and an order form to a client device; wherein the order form includes a field that includes a plurality of selectable sub-fields corresponding to a plurality of content delivery networks; and wherein executing the instructions on the client device causes displaying, on the client device, at least the plurality of selectable sub-fields of the order form, and allowing a user of the client device to select one or more content delivery networks, from the plurality of content delivery networks, from which content data of the user is to be delivered to a plurality of customers; and a controller: controlling the communication unit to receive the content data of the user and a completed order form, which designates one or more selected content delivery networks, from the plurality of content delivery networks, from which the content data is to be delivered to the plurality of customers; causing the communication unit to deliver the content data of the user to one or more content data stream delivery servers that belong to the one or more selected content delivery networks.