Hello Anders,
It is doubtful that there is a video of Sgouros playing *Rach's 3rd*. Try YouTube and see if you can come up with something.
Cheers,
Corno Dolce
Alert: Here he is:
http://www.youtube.com/watch?v=YNB98D8H3Wo
Wow - he had matured since I heard him at Carnegie Hall.
In the Ossia Cadenza he used during this Melbourne Concert, his playing of the chords are not the way the composer had written them. Get your Rach 3rd score out, look and read very carefully the way Rachmaninoff notates the chords and the rhythms. Here are not so much wrong notes, these are rhythms which go contrary to the score and are not musicologically informed. Listen to a recording conducted by Andre Previn and played by Vladimir Ashkenazy - there you will hear a musicologically informed interpretation. As a contrast, listen to Arkady Volodos play the same piece - He has the *Rachmaninovian Sweep*.