No idea, will have to think about this. BIL gave us a DVD player on one of our early anniversaries, so I think we got it around 2001, 2002. I remember going to the Blockbuster, and the video area at the local grocery store, and there'd be like 1 or 2 DVD copies for each movie, and the DVDs were always available, while all the videos would be checked out. We could rent almost everything on DVDs, even the most popular. Was so cool.
I know we bought the DVD sets of Star wars as soon as we could, but not sure what the first DVD was.