I agree. An old friend of mine died last year, and I recently discovered a youtube video of her speaking at an academic conference. The subject doesn't interest me, and while she was alive I wouldn't have even bothered to search for videos much less watch it. But now she's dead it is the only record I have of what her voice sounded like, how she expressed herself. So I downloaded a copy to keep and although it's unlikely I'll watch it again, it is some tiny comfort. Context changes the value of these things.