Who sang September Song there was a black and white film clip of woman singing at what looked like 1950s version an Edwardian dinner party on YouTube but gone now anyone know who?

The woman singing "September Song" in a 1950s-style black-and-white film clip at an Edwardian-style dinner party on YouTube could be Eartha Kitt. Kitt rose to fame in the 1950s and was known for her sultry singing style and stage performances. She frequently sang "September Song" in her concerts and recordings, making her a strong candidate for the person in the video.

However, without direct access to the video or more specific details, it is difficult to confirm the identity of the singer with certainty. There may have been other performers or interpretations of the song recorded in a similar fashion during that era.