I've got videos for all four movements plus two commentary videos where I tell you the parts I think are interesting.
Once you've familiarized yourself with this material Exercise #4 asks you questions about it. As always I strongly recommend that you open the exercise in a new tab so you can flip back and forth between the questions and this reference page. (Also, remember that you can stop at any time and restart later.)
First Movement Commentary
Here's where I talk about the work as a whole and point out a few things in the first movement.
The actual movement all the way through.
I am using Igor Levit's recording on Sony for most of these videos.
More commentary on the other three movements
Here I run through some aspects of the rest of the piece.
The pianist in this video is Andrei Andreev.
OK! That's everything. Now it's time to try Exercise #4.