I recently discovered a 1 hour video of a family member telling the story of his experiences in the US Army invasion of North Africa and Sicily, 1942-1943, in which he won a silver star and was grievously wounded. The video was recorded in 1990 when he was in his seventies. I believe these stories have never been recorded anywhere else, and they are somewhat backed up by documents such as the medal award letter.
I don't really know how stories get from someone's attic into the hands of historians. Would you expect this material to have any interest to historians, or is it probably only a family memento that goes back up in the attic?
A single interview is not going to be paradigm shifting, but that doesn't make it uninteresting to researchers. I would recommend you get in touch with the Veterans History Project at the Library of Congress, which is the organization that first comes to mind in possibly having an interest in something of this sort.