This video was taken on the 7th of december 2007 in "Raz de Sein" at the western tip of France, in Brittany, on a (very) stormy day.
Those lighthouses isolated in the open sea are/were called "Hells" because of the roughness of living conditions inside these isolated buildings, frequently harassed by the elements.
The first one seen in the video is Ar Men ("The Rock" in Breton).
Considered as one of the most challenging workplaces by the community of lighthouse keepers.