In one embodiment, there is a content delivery system comprising: a communication network; a media component configured to transmit media content and associated metadata to user devices; a store holding permission vouchers for users of the system; an auxiliary content management component configured to: receive a request for auxiliary content insertion information from a user device, the request comprising an identifier of a user of the user device and an identifier of desired media content; access said store to determine permission for consumption of the desired media content in a resource constrained playout mode at the device based on at least one permission voucher for the user; generate auxiliary content insertion information based on the identifier of the user, the identifier of the desired media content and the at least one permission voucher; and transmit the generated auxiliary content insertion information to the user device.