Celebration, and GMA talk here:
http://originaltrilogy.com/topic/Celebration-2017-Speculation/id/54702/page/6#1064412The frame captures are taken from some of the samples used to show other industry insiders when the restoration was being done.
Tests were made on Star Wars, and The Empire Strikes Back. Yes, the clips are higher quality than the Vimeo ones.
R1
And you have said clips? Are they from the SEs?