Many programs in the early days of television were live broadcasts that are lost because they were not recorded. Most prime-time programs that were preserved used the kinescope recording process, which involved filming the live broadcast from a television screen using a motion-picture camera (videotape, for recording programs, was not perfected until the late 1950s and was not widely used until the late 1960s). This was also a common practice for broadcasting live TV shows to the west coast, as performers often performed a show back-to-back, but never three times in succession.