Voiliers Classiques Moth, Dériveur Classique Moth.
Plans de Moth Classique
A Moth European Championship sailed in Algiers, Algeria (at that time a département - administrative region - of France - see Tillerman's comment). Looks like the late 1950's, early 1960's. We can see the transom-bowed French Fragniere Moth design as well as the scow bowed Nantais design. (The British Queen Mother makes a short appearance at the beginning of the video.)
Further French Moth stuff here.