I love Chopin, so I listened to your video. It reminded of my trip to Warsaw. This piece is actually really difficult to me. Among his Valse, Op 18, Op 34 No 1, Op 42 may be technically more difficult, but they are quite obviously waltz and they are easier for me.
Op 64 No 2 got so much emotion and particularly Piu Lento section almost doesn't feel like waltz. I think you captured the feeling of being Waltz really well, in a very simple manner. So I was thinking to ask my question, and then, read the threads. You guys intimidate me - I am an amateur in mid-40 who simply loves playing piano, even though my playing is quite horrible beyond your imagination.
I just wanted to ask, can you share how you guys develop your inspiration on a piece like this? Is there a rule which beat to emphasize on waltz?
By the way I think you have a wrong note at the end of Piu Lento section, it should be all D-flat, I think you are going up from A-flat to D-flat or something (I am not in front of piano, so I may be wrong). I do agree with Piu Mosso section with everyone else, it lost it there - maybe it needs a bit more elegance...like everyone is turning around with a beautiful long dress on the dance floor. The last note C# needs to be voiced maybe. But I can't play it anything like you do myself, so my advice is not important....