A Yankee in ZXDB

[Seven.FFF]

So basically, the first 8x8 SCR is inauthentic, because it's been put through a transformation process to capture what the user saw on the screen in that frame.

But the second 8x8 SCR is authentic, even though it's been captured with a different sampling method and rate, then put through several transformation processes into a file that in principle would contain exactly the same bytes (if it was from the same gameplay instance, at least).

[Einar Saukas]

So basically, the first 8x8 SCR is inauthentic, because it's been put through a transformation process to capture what the user saw on the screen in that frame.

No, it wasn't what the user saw in that frame. It was a composition:

I then grabbed a couple of frames from that GIF, opened them in a graphics editor, and cut and moved the sprites around until I was satisfied with the composition.

[Seven.FFF]

I ran a green sharpie round the edge of my monitor, but the bits didn't sound any better either.