TV's Frink said:

Does it definitely exist? Is it definitely the OOT?

I thought these were the kinds of questions that the ridiculous 4k thread utterly failed to answer.

Yes to the first, ? to the second, although according to my screenshot comparisons (now buried in that thread) the released material appears to be an at least partially new cleanup of the original negatives, and not an IP or IN. And that's pretty much the end of any useful speculation on the matter, at least in my opinion.