A Video On Demand (VOD) method consistent with certain embodiments involves processing content to be delivered in a VOD method by selecting first portions of the content for encryption under a selective encryption system and selecting second portions of the content to remain unencrypted. The first and second portions are stored until receiving a request for delivery of the content, the request being from a terminal having decryption capabilities associated with a first decryption method. The first portions are then bulk encrypted to produce encrypted first portions. The encrypted first portions are stored in a buffer. The second portions are queued for delivery to the terminal. A stream of selectively encrypted content is assembled from the encrypted first portions and the second portions. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.