Thank you but I'm almost certain it's not in Brittany: as far as I know there are no sheer orange walls like that. It's certainly not Pen-Hir, and that's pretty much the only extensive crag in Brittany.
Eh, on a tip I looked up Cantabria in Spain and found it, it's called Arna Playa, is not as orange as the video makes it look and features about a dozen routes, half of it bolted.