Be Natural (2018), the feature-length documentary by Pamela Green is now available on DVD and Digital Download from Kino Lorber.
Kino Lorber has other DVD sets where you can find films made by Alice Guy, such as:
Gaumont Treasures (which includes many of her French films),
Pioneers: First Women Filmmakers (beautiful! Don't miss it! And don't miss my commentaries on the Alice Guy films!)