I had similar questions about traditional practices, and my students and I came up with this solution:
Jack Dougherty and Candace Simpson, “Who Owns Oral History? A Creative Commons Solution,” in Oral History in the Digital Age, ed. Doug Boyd et al. (Washington, DC: Institute of Library and Museum Services, 2012), http://ohda.matrix.msu.edu/2012/06/a-creative-commons-solution/.