system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is there so much footage of nuclear bomb tests, etc. from years ago, but no recent or modern footage now? Has the world stopped testing or is it just now made public?
gpt
Most testing moved underground, literally. Specially constructed facilities that sort of resembled bomb shelters, but in reverse, and deep underground.

The footage from those is sort of a "dark place, really dark, blindlingly bright, camera destroyed".

The tapes you are talking about were cameras spaced out from "nearby" to "far away" where the camera might not be destroyed, or at least the camera could get several seconds to a few minutes of footage before being knocked over.