Video-on-demand service Movielink will offer expanded music offerings after making deals with two San Fernando Valley companies. Teaming with Burbank-based CenterStaging Musical Productions, Inc. Movielink will provide access to rehearsals by top acts and give fans a backstage view of all that goes on before concerts, television shows, tours and recording sessions. Egami Media, Inc., a subsidiary of Image Entertainment, Inc., in Chatsworth, will provide a wide range of music concert titles, as well as independent films and television series. Movielink, available to U.S. Internet users with broadband connections, is a joint venture of five movie studios, including Universal Studios and Warner Bros.