Stills are posted from the original sample video files mentioned earlier. These were shown at industry shows, and to other vendors in the video restoration field. The source files I have are 1080p, which were scaled down from 4k. Of course, to protect the sources, they will remain anonymous.
The source clips in the Vimeo link are from the same source, with the same scenes. However, they did not post the Grain comparison clips.
All clips are WIP. Whether they finished them or not is unknown.
Most mentions of the SE, and since then refer to a private Technicolor print used by Lucasfilm.
Ref : http://savestarwars.com/technicoloribscreening.html
In fact, it was a private print lent to them for use in color reference.
The current 4k Technicolor scans are being used in private projects, one of which was started on OT,
but the thread is locked, and moved to a private forum. All these projects are hybrids of multiple sources
used to overcome the shortcomings of just one print.