Considered by Bud Abbott and Lou Costello fans to be their "lost" film, it was never actually lost but was unavailable for viewing for many years due to legal issues with the Damon Runyon estate. The film was televised decades ago (presumably before the legal issues arose) but was never released on video, and was not included in MCA/Universal's original DVD sets of Abbott and Costello films that came out in 2004. In 2008 the rights issues were cleared and "It Ain't Hay" was included in the DVD release "Abbott and Costello: The Complete Universal Pictures Collection."
There is a shot of a restaurant called the "Windsor House Band Box". This is an inside joke referring to The Windsor House, a restaurant owned by Lou Costello, and The Band Box, a nightclub owned by Bud Abbott.