From LivingPianos.

https://livingpianos.com/5-secrets-to-playing-chopins-e-flat-nocturne/

Welcome to LivingPianos.com. I’m Robert Estrin. Today I’m going to show you how to play Chopin’s most famous nocturne, the Nocturne in E-flat Major, with real expression. It’s one of the most beloved piano pieces ever written, and there are some special techniques that will help you bring out its beauty.