The most significant posting to my mind is this collection of b-roll footage from the YesYears documentary, filmed in 1991 during production rehearsals in Pensacola, Florida. A bit of it can be seen in the actual documentary (as well as the Yes Greatest Video Hits DVD), but it's a great find.
Next up is ABC's In Concert '91, featuring footage from the Denver stop of the Around the World in Eighty Dates tour with the Union lineup, with performances of "Owner of a Lonely Heart," "Lift Me Up" and "Shock to the System." The Denver footage has been available online for many years of course, but there are a few different variants (camera angles/editing, sound mix) depending on who was broadcasting the source material.
This next interview has also been available on YouTube previously, although I believe this is likely a better-quality version; originally aired on MTV to promote Union and the Eighty Dates tour.
This next one is something I'd not seen before, but mislabeled - it's from the 8/6/91 performance at the Pacific Ampitheatre in Costa Mesa, California (Orange County fairgrounds), not Colorado. That portion of the tour was primarily outdoor sheds, so not performed in the round.
And last but not least is a full version of "Shock to the System" from Denver as shown during the Kurdish Refugees Relief telethon on MTV. This video has also been uploaded previously but not including the introductory remarks from Rick Wakeman. More than a few of us in fandom believe this is the superior edit of that particular footage.
