Go to OneSearch and search for your topic.
Limit the results to Visual Materials or DVD or VHS.
The Thrift Library has a large collection of recorded sermons in both Cassette and CD-ROM.
Go to OneSearch and search under "Preaching". Then limit to "Sound Recording".
CDNM BX6333.A1 L47 2002 "Lest we forget" heritage series [sound recording] : a collection of sermons that have impacted modern Southern Baptists life.
CDNM BV4211.2 .P84 2003 v.2 no.1 PulpitTalk [sound recording] : Preaching the Old Testament. Fall 2003, Vol. 2, No. 1 / [edited by Scott Gibson].
CASS BX1752 .J64 1995 Why do Catholics do that? [sound recording] : [a guide to the teachings and practices of the Catholic Church]
CD ROM 93 [not audio CD] Word Biblical commentary: the Gospels.