Remember, awhile back, when all the nerds were up in arms that we were consigning petabytes of information to the dustbin of history because it was recorded on obsolete media? Progressives wanted government intervention to stop it while opportunists wanted to spend the money a fat federal grant would provide? You know, to ensure precious information would not be lost simply for the lack of a player? Yeah...about that...
As long as the media survives, there will always be people clever enough to tease it out. It may not be easy, and it may not be cheap, but it will happen. Anyone else is selling something.
And by the way, did I mention my VCR collection? You know you'll never get to see those old tapes again, otherwise...
I remember when the Smithsonian decided to store historic images on... wait for it... laserdisc. (My spellchecker doesn't recognize the word!)
But you're right, any kitchen table tinkerer could make a laserdisc reader. Figuring out the irrational mystery that is NTSC would probably be the hard part.
I actually used some laserdiscs recently. I was moving, and used them to protect vinyl LPs.