Who owns your words?
You do. And your narrator or interviewee - the person you interview - owns his or her own words, too.
Why does it matter?
The content of an oral history interview is an original document created by two people: the interviewer and the narrator. As such, it is subject to copyright law and may not be used unless both people give their permission. When spoken words are recorded in tangible form, they are protected by copyright, and copyright belongs to the speaker of those words.
From Capturing the Living Past: An Oral History Primer - Nebraska State Historical Society
Before conducting the interview you must ALWAYS have the person you're interviewing review and sign the following forms.