Sisters with Transistors
Sisters with Transistors is a 2020 film by Lisa Rovner about early female electronic musicians including Clara Rockmore, Daphne Oram, Bebe Barron, Pauline Oliveros, Delia Derbyshire, Maryanne Amacher, Eliane Radigue, Wendy Carlos, Suzanne Ciani, and Laurie Spiegel as well as voiceovers from even more contemporary composers.
It has three separate sections devoted to Delia including the entirety of her 1965 presentation of her techniques for Tomorrow's World.
Despite its femminist angle (and note that Wendy Carlos only gets just a few seconds and is not mentioned in the closing credits!), it is incredibly well-researched, musicologically deep and has an almost continuous smorgasbord of rare archival video footage and electronic music.