Most likely Taiwan DS Blu-ray 1080p extras

Most likely Taiwan DS Blu-ray 

It's included in all three An Elephant Sitting Still Blu-ray releases as 1080p extras, from An Elephant Sitting Still review, the Taiwan DS is probably the best one

Taiwan DS Blu-ray

Taiwan DS Blu-ray is the best release, see caps

France Capricci Blu-ray has worse encoding than Taiwan Blu-ray

US KimStim Blu-ray has Quicktime Gamma Bug and a slightly worse encoding than Taiwan Blu-ray