If your kids think it is something their kids will want to see, your kids will preserve it (or copy it) and pass it on.
I have old pictures from my great grandparents. I have them on my phone as jpegs. They took no steps to preserve the actual film for 120 years or otherwise figure out how their great grandchildren would see it.
In short, if it’s worth preserving, it will be preserved (or copied to whatever medium is currently in use) by your successive generations. If it’s not worth preserving, it will be tossed and ignored regardless of steps you take.
I have old pictures from my great grandparents. I have them on my phone as jpegs. They took no steps to preserve the actual film for 120 years or otherwise figure out how their great grandchildren would see it.
In short, if it’s worth preserving, it will be preserved (or copied to whatever medium is currently in use) by your successive generations. If it’s not worth preserving, it will be tossed and ignored regardless of steps you take.