I wonder how folks can make such bold critical judgments on so short a fragment of a performance, especially considering how thrilling the short clip happens to be! But then where is the context? How does anybody who has not heard the complete performance even know what she was doing with the piece (especially in the Chopin)? And sloppy?! On what planet is that sloppy!?
I've not heard nearly enough to judge her artistry, but I've heard enough to know that there is a point beyond the speed, and there seems to be an inspiration flowing through her that would compel me to see her perform had I an opportunity.
For me the most striking thing is her name, Elizabeth Schumann...like, not Elizabeth, but Elisabeth Schumann, one of the greatest singers of all time...and she's doing Schubert Lieder transcriptions! Now it's possible that some here have never encountered the soprano Elisabeth Schumann, for her best days were before or on the edge of the era of recording, but she did record quite a bit in the 1920's and 30's. Attached is THE Elisabeth Schumann singing Gretchen am Spinnrade with Gerald Moore, recorded November 26th, 1936.