Try looking at Doug Boyd’s blog at The Louie B. Nunn Center for Oral History at the University of Kentucky: http://libraries.uky.edu/libpage.php?lweb_id=11&llib_id=13
Boyd has developed the software package OHMS, which allows organizations to create a digital database specifically for oral histories. It publishes the history on line, and lets you link abstracts, indices, or transcriptions to the audio or video. It allows for keyword searches of the transcription that will fast forward the video directly to the keyword. However, the interview MUST be transcribed and the time code of the video matched to the transcription. Very labor intensive. Figure four to eight hours of transcription work for every hour of video. And it is not something that just anyone can sit down and do.