[Videotape film production; videotape editing; dubbing;] rental of audio-video equipment with or without an option to purchase, [rental of videotapes with or without an option to purchase;] movie studios; rental of audio-video apparatus and accessories with or without an option to purchase; rental of video cameras with or without an option to purchase; [videotape editing; organization and conducting of conferences; seminars and exhibitions; recording studios; training in the fields of telecon...