it's not gone, just more difficult to extract

video has certain temporal statistics which can allow you to fit the missing information

only true blurred white noise is impossible to recover

It really is gone. You can predict what you think it might have been, but you can't know what it was.

it's gone in a single still frame

but across many consecutive frames, the information is spread out temporaly and can be recovered (partially)

the same principle of how you can get a high resolution image from a short video, by extracting the same patch from multiple frames

	▲	weinzierl 4 hours ago \| parent \| next [-]
		That looks interesting. Is there ready-made software that can do this? Doesn't have to be easy to use just useable with a time commitment of a few days.
	▲	ErroneousBosh 3 hours ago \| parent \| prev [-]
		No, it's not "restoring detail". The information is gone. It is predicting what the information might maybe have been like.