My opera loving Mom adored Lily Pons. She was on TV back in the day...and our yellow cocker spaniel, Wendy, sang with her, trying as hard as she could to modulate her voice to match Ms. Pons trills. We didn't have the heart to stop her as Wendy too was clearly a fan. (She only sang with the best singers, and preferred Coloraturas.)
if there was ever perfection in coloratura soprano this gets pretty close - thoroughly enjoyable - Lily Pons is simply marvellous- just mind blowing how she sustains that final note to perfection!
I believe that that this is from s film called CARNEGIE HALL or something similar. There is a website called “Belcanto” where you can buy CDs, DVDs and books and I believe the entire film is available. There have films based on operas where the musical score is used but I’m not sure which titles. I know there is of DER ROSENKAVALIER with Schwarzkopf that was restored and available on DVD and Blu Ray.