(answering another question)
This is a private Blu Ray that an archivist had transferred, which has unfortunately leaked. Leaks like this meant that the archivist has stopped doing these grey-area restorations, I think. These are very expensive to do, and the only reward for them at the end of the day is seeing them posted without credit.
The archivist believes the film to be public domain due to the US government's connections to ITT, which were a big scandal at the time. (I think that's very debatable but there is no good paper trail for this film's rights, and a big corporation would have to just take credit for it at this point, either Disney or Paramount, and just dare someone to complain. The Raposo family is available for music rights issues, the Gruelle family not so much for the characters.)
Some have said that this film was actually made to deflect from that ITT scandal (after the death of Allende and so on). Others said that this film was itself a government project in some ways, as somebody (fighting the "Cold War") wanted a big Disney-style American spectacle for the bicentennial in 1976. That deadline was missed, but Joe Raposo's Broadway musical of Raggedy Ann (which is much darker) was used as the first American musical performed in the USSR a few years later.
At any rate there was a lot of publicity for the film in 1977, and reviewers were mostly kind, but it didn't do well at the box office. 1977 belonged to Star Wars (also a FOX film), and Joe Raposo was quoted as saying nobody was going to G films at the time, and that the cinemas were saturated with porn films. A glance at any theater listing in old newspapers when Raggedy Ann was playing supports this.
The SD transfer that you saw from 2007- which is now common on the internet- was part of this effort to try to figure out how a DVD or Blu Ray could be done of this film legally. I did the video edit and restoration, and an archivist was there along with another animator/archivist. I'm not sure how much of that I should admit.
Some of that 2007 transfer survives in this version, due to missing scenes (!)
This film was not available in widescreen at all before that. There were VHS copies only. We transferred The Little Island the same day, which was not previously available, and scenes from The Thief and the Cobbler. I was not happy with the 2007 transfer, and was happy to redo it recently.
This transfer looks very dirty to me, much like the first 35mm tests H did for me awhile back. It's dirty because the prints are dirty, and missing footage because the prints are missing footage.
H was able to get much cleaner, wetgate-like results this time around without ANY of that dirt and missing footage, so the 2021 transfer, which has not leaked, is very good. I'm waiting for further restoration to be done before doing anything further with it. I've discussed this a bit on Twitter. I'm also still fiddling with the extended Super Mario Bros 1993 film, and some other material you can see from ocpmovie at archive. org.
In the meantime I suppose this leak is good enough. I've noticed a new fandom has grown around this film, and around Joe Raposo and William Gibson's much darker stage play of Raggedy Ann, about which very little was known when Vinnie Rattolle and I started researching it years ago. That play now has a fandom, and it's about time!
(answering another question)
I spent 8 years restoring The Thief and the Cobbler, as the Recobbled Cut. 30 minutes of the 90 minute movie is in HD. The rest is not. This was material we were able to salvage from early film reels found in Jean MacCurdy's trash at Warner Bros in the early 90s. (As well as another reel or two from Ebay.)
The Thief and the Cobbler (in any form) has never had an HD release on home video, or what I would call a high quality release. Before his passing, Richard Williams screened his own workprint of the film in HD as A Moment In Time. This version has not had a home video release.