Okay so I watched a little bit of the vid, and I can tell you that Mike is being both loose with the truth, and not fully forthcoming about what he has changed. The '77 crawl as I mentioned he rotoscoped every letter, it’s in one of his Vimeo videos, yet he says it’s what he got just from layering prints! He removed the colour distortions from optical compositing and the “garbage mattes” from space composites because he feels that audiences didn’t see them in 1977. That’d be no different to claiming that Terminator audiences in 1984 didn’t see the wires attached to the HK models as a justification for removing them. He goes on about how the Mos Eisley drive-through shot is the worst looking shot in the film, but he doesn’t make clear that lots of movies have one low quality shot like that in them, or that actually all of the optical composite shots especially involving optical zooms, dissolves, and wipes typically come out at lower quality. Which is why higher budget films do those effects using a 65mm intermediate. Touching them up to bring them up to the quality of the rest of the film is exactly what the intention of the 1997 Special Edition was - it was a photochemical restoration more than anything else, with a few CGI shots inserted.
Finally Mike says that Legacy is the “original version” - I disagree. It’s his version, that he is happy with and that’s perfectly fine. But he has made alterations to it to make it the way he feels the movie should look, including making it way sharper than was ever intended in 1977.