Sort of. The text posted with the video suggests it’s part of the Drummond Ranch near Pawhuska, OK. Probably an off-range pasture contracted to the BLM. This is where the older/unadoptable horses end up. Almost like being on the range…except there are no stallions, no bachelors, no foals, no families. All mares in this case.
More info in this article. H/T Sherryl Hannah.