I believe that the footage was take off Ushant. The ship with the red slash on the hull is one of the 'Abeille' salvage tugs, one is based in Brest and there is another the 'Abeille Liberte' based in Cherbourg. The lighthouse is close to a place called the 'Raz du Sein', a nasty piece of water with insane tidal flows and standing waves.
I took a Nelson 45 down through that way in the summer of '91 in no more than a F2 to F3 and also timed when the tide should have been slack and managed to bury her in green water up to the flying bridge. We went through a piece of sea for a duration of about 9 nm's which was like a slalom course, the sea was just a series of steps caused by standing waves due to tide.
I also have a series of photos (hanging in my house) taken from a helo looking back towards the Ushant headland at dawn after an Atlantic storm in Dec. 1989 had passed through.Huge waves and swell.