I had only seen the long view of this one before, not the FPV, so I'm surprised to learn that the running in circles thing actually did help - the drone had to get around to the other side of the vehicle to get a clear shot at them. Must have been terrifying on a primal level - humans facing actual nonhuman predators whose goal is to kill them and before which they are completely helpless. Been a long time since there were predators like that in the wild. The only way they might have survived is to have split up and sacrificed one for the other.

Original video with audio: https://files.catbox.moe/75tr1i.mp4