On: "It's a Silent Fire": Decaying Digital Movie and T...

[CharlesW]

You might call the “best copy” level “intermediate masters” or “DIs” (https://en.wikipedia.org/wiki/Digital_intermediate), and there may be a bunch of these for different editions, versions, and frame sizes/rates.

[bombcar → CharlesW]

I'm more familiar with audio - but yeah, things like source tracks after mixing but before compression, etc.