i know of (and possibly have, haha) a video of volker banfeld playing all of the book 1 and a few book 2 etudes of ligeti. he is the dedicatée of a few of the etudes. also, aimard has done autumn a varsovie and der zauberlehrling live as far as i know (in carnegie hall). no idea about the godowsky etudes though.
I also wonder if anyone has a videorecording of Godowsky´s Chopin study number 25/11 ?
Does he play them well?
this guy (volker banfeld) is probably the most emotionless person ive ever seen. but still, his video is the only video i have of the complete book 1 etudes and of the few book 2 etudes he plays. he has a great technique and makes these etudes look easy. but aimard and ullén seem to have more dominance over these pieces. they probably show much more expression also.
Volker Banfeld:&search=ligetiFrancesco Libetta:&mode=related&search=ligeti