1. A method performed by one or more devices within a closed distribution network, the method comprising: sending, by one of the one or more devices and to a video client, a trigger for initiating a transactional advertisement, the transactional advertisement being cross-referenced with an indicator associated with a content of a linear program segment; sending, by one of the one or more devices and over the closed distribution network, the linear program segment to the video client; receiving, by one of the one or more devices and based on the trigger, a request, from the video client, for instructions that enable the video client to provide the transactional advertisement for display in conjunction with the linear program segment; using, by one of the one or more devices, information included in the request to determine the instructions and contextual information associated with the transactional advertisement, the contextual information relating to the content of the linear program segment, and the instructions including information for obtaining the transactional advertisement; and sending, by one of the one or more devices and to the video client, the instructions and the contextual information to enable the video client to provide the transactional advertisement for display in conjunction with the linear program segment.