IncredulousChris 
From Wikipedia:
“According to Le Prince’s son, Adolphe, the film was made at Oakwood Grange, the home of Joseph and Sarah Whitley, in Roundhay, Leeds, West Riding of Yorkshire, England on 14 October 1888. The footage features Louis’s son Adolphe Le Prince, his mother-in-law Sarah Whitley (née Robinson, 1816 – 24 October 1888), his father-in-law Joseph Whitley (1817 – 12 January 1891) and Annie Hartley in the garden of Oakwood Grange, leisurely walking around the garden of the premises. Sarah is seen walking – or dancing – backwards as she turns around, and Joseph’s coat tails are seen flying as he also is turning. Joseph and Sarah Whitley were the parents of Le Prince’s wife, Elizabeth. Annie Hartley is believed to be a friend of Le Prince and his wife. Sarah Whitley died ten days after the scene was filmed.”
