The Debatable Choir performed at the Agincourt event this past weekend.
Look,
video! (About 18 minutes total.)
The camera was set in advance and not manned, so there was nothing to be done about the two basses and 1.5 sopranos you can't see. We were not that spread out in practice, oops. And we can't even blame it on hoop-skirts! :-)
"Quam Pulcra Es" is in the second part, for those who are wondering how that came out.