Funny that the technical reality is the inverse, i.e. media is read-only and storage/playback is now trivial beyond availability, software is executable and requires a degree of active maintenance.
Both storage (and retrieval) and playback are based on software.
Basically, the recording is in an obscure video format. People at the NSA can’t easily watch it, so they can’t redact it. So they won’t do anything. [0]
0. https://www.schneier.com/blog/archives/2024/07/the-nsa-has-a...