Implementations of the system and method use an existing management server infrastructure to deliver video-on-demand or streaming content, including real-time live streaming. Existing client content playback devices, such as IPTVs, may be employed to stream content items, obtain advertisements, track user's viewing behaviors, and the like. By reusing existing client devices, there is no need for additional hardware purchases on the user side. By reusing existing management server infrastructures, capital expenses are also reduced. In such a system, a user can watch both video-on-demand and streaming audiovisual content.