Follow the guidelines in C4.1 but indicate in the title that the collection is being represented on more than one record.  The clearest means of doing this is to indicate the specific number of the record out of the total number of records, as in "Record 1 of 2," to ensure that users know that the collection is represented on more than one record.

245 00 $a [Women's rights films. $n Record 1 of 2].

245 05 $a [Women's rights films. $n Record 2 of 2].

See also:

Appendix C7.  Cataloging divided into more than one record

Appendix C:  Collection-Level Cataloging