As luck would have it, I was trawling through the and found a video link that still works:
http://hem.fyristorg.com/malmer/argentum.wmv
The trouble is that it's from an old version of the game and the video quality is mediocre at best, so it doesn't represent just how darn superb the game actually is. Still, it's better than nothing, and I don't think the music has changed...