University lawyers say Lisa Simpson's attorney failed to designate the videotapes as confidential under a protective order in court.
A Denver television station and ESPN filed requests for the tapes under the Colorado Open Records Act. The tapes first aired Tuesday night.
Simpson claims she was raped during or after an off-campus party for football recruits in December 2001. She says release of the tapes is an example of the university using a defense that punishes the women involved.