Complex sentence: Several musical numbers filmed for the movie were cut from the theatrical release, including numbers by Horne and Tormé that would later surface on a special DVD packaged in a 2004 box set of the "That's Entertainment!" films.
Split into simpler sentences: Several musical numbers filmed for the movie were cut from the theatrical release. They would later surface on a special DVD packaged in a 2004 box set of the "That's Entertainment!" films.