A system is disclosed for media content search and retrieval, and a virtual television channel capable of using that system. The present system may be implemented on a computing device, such as for example a media service server, and a client device, such as for example a set top box for a television system, a mobile telephone, a personal digital assistant or a gaming console. A first aspect of the present system relates to a media download control engine which enables a client device with limited capabilities to play media content which comes from a website in a format not supported by the client device. A second aspect of the present system may make use of the media download control engine to obtain media content and create customized virtual channels. The second aspect in particular relates to a virtual channel engine that schedules a continuous stream of content for the user, which content is selected based on topics of interest to the user.