1. A recording medium having a hierarchical directory structure, comprising: a root directory; a default directory below the root directory; a service domain directory below the root directory; and a movie directory below the service domain directory, wherein the default directory contains a startup program, wherein the service domain directory is created at a time when an audiovisual stream is received via a Manufacturing on Demand service or an Electric Sell Through service, wherein the movie directory contains the audiovisual stream, wherein the startup program is a program to be first executed by a playback device upon loading of the recording medium to the playback device, wherein, when executed, the startup program causes the playback device to display a menu, wherein, in response to a user operation made on the menu to select the movie directory, the startup program causes the playback device to execute a root change function, and wherein, when executed, the root change function causes the playback device to recognize that the service domain directory, to which the selected movie directory belongs, is a virtual root directory.