The Lady and the Mouse (1913)

I don't know about the DVD part, but I've seen Lady and the Mouse--it's
a charming film he did in 1913 as his short film career was winding
down. Here's my review:

A fairy tale in modern dress, The Lady and The Mouse (1913) tells
about a grocery-store worker who helps a sick tramp. The grocer
(Lillian Gish) starts to drown a mouse she has caught, but can't
bring herself to do it. The tramp is really a disguised millionaire,
who is won over by her innate goodness. He returns out of his disguise
to pay off debts, help heal a sick sister, and propose marriage. The
moral of A Lady and the Mouse can be summed up in a quotation from
Hebrews, "Be kind to all strangers, as they may be angels in
disguise."

If you want to see a photo from the film, google my name and "Lady and
the Mouse" and scroll down to the review.