This video shows a flat-spin test flight with a BRS parachute save at about 1000'.
https://tinyurl.com/y9ab9dro
I thought I recognized the pilot and it was confirmed at the end of the video. It's Phill Hooker, a well-known Kiwi instructor, who did my first Kiwi BFR and who also allowed me to pole around his Bell 47G, a few years ago.
He's now living in Zuhai, working as a factory test-pilot. Here is one of his comments on the incident:
I was exploring any flat spin tendencies that this type of aircraft was rumored to get itself into. and yes it did, it would not recover. Deployment at 1000' (could not do any higher, too long to explain) If you watch the video again, you will notice the front right riser tightened 4 secs before impact
His only injury was being hit on the head by the canopy, as he exited.