Part of the “Exhibition on Screen” series, the film “The Impressionists and the Man Who Made Them,” directed and produced by Phil Grabsky, is a behind-the-scenes look at the sole supporter of the Impressionist group during the turn of the 19th century: the Parisian art dealer and connoisseur Paul Durand-Ruel. Produced in conjunction with the traveling show “Inventing Impressionism” — which has already been on view at the Musée d’Orsay and London’s National Gallery, and will open at the Philadelphia Museum of Art on June 18 — the film provides viewers with the opportunity to learn about Durand-Ruel’s career and his role in establishing the pillars of the modern art market.