This is a rare film of Renoir at work.  You can see his hands are horribly deformed by rheumatoid arthritis.

Hard to look at, but also inspiring.  He was in pain, but he still kept painting (“shipping”) anyway.  The music, by the way is Chopin’s PIano Concerto No. 2, second movement (thanks to commenter John Lyons on OpenCulture for pointing this out).