There are a lot of different pieces in the Impressions de France video, not just the final movement of the Saint-Saens Symphony # 3 "Organ":
Cliffs of Etretat in Normandy: Debussey - "Solo for Flute"
Marais Poitvin near La Rochelle: Saint-Saens - "Aquarium" from "Carnival of the Animals"
Chambord in the Loire Valley: Boieldieu - "Concerto for Harp and Orchestra"
Chateau Beynat in Dordogne Valley: Debussey - "Nocture 1"
Bicyclists at La Roque: Offenbach - "Gaite Parisienne"
Hot air balloons near Chateau Chaumont: Ravel - "Daybreak" from "Dauphine et Chole Suite 1"
French Alps: Debussey - "Claire de Lune"
Skiers in Chamonix: Erik Satie - "Trois Gymnopedies"
Mont St. Michel: Saint-Saens - "Aquarium" from "Carnival of the Animals" (again)
Wedding reception in Brittany farmyard: traditional folk music (unidentified)
Railway tracks in hills of Champeauroux: Saint Saens - "Finale" from "Carnival of the Animals"
Notre Dame de Paris: Offenbach - "Gaite Parisienne" (again)
Garde Republicaine rides through archway at the Louvre: Dukas - "Fanfare" from "La Peri"
Eiffel Tower: Saint Saens - 3rd movement from Organ Symphony no. 3