Art, Music & Design - 31 free documentaries about impressionism & post-impressionism.
Start with Why Did Vincent Van Gogh Cut Off His Own Ear? (49 min, Absolute History), then John Singer Sargent (Full Length): Madame X and Dr. Pozzi (33 min, Great Art Explained). All 31 documentaries here are free to watch from their makers' official uploads. To read deeper, the top-rated book on impressionism & post-impressionism is The Judgment of Paris by Ross King.