Chopin's music is to die for but I have never heard him sing. Most if not all of his works as I am aware are purely instrumental. I could be wrong but I don't hear any vocals on this selection. I also think that the pianist is a little heavy handed at times but it's still a great work.
A little digging and you will find that this is none other than Krystian Zimmerman (Polish). Very impassioned personalized performance. No one is better than Rubenstein playing Chopin--perhaps with age?