Hello MMD,  GSM honorary president Jürgen Hocker, who has a reputation
for his knowledge about Conlon Nancarrow, took the task to make video
records of all "Studies for Player Piano", composed by Nancarrow, and
presents them now on YouTube, where you may observe the motion of the
piano rolls:  http://www.youtube.com/user/playerpianoJH 

Up until now this mode of presentation was not possible, because only
Jürgen Hocker and the Paul Sacher Foundation of Basel are in possession
of a complete set of piano rolls.

The records may also be found by searching at YouTube for "Jürgen Hocker"
and "Video".  Thus you have access to all 56 studies.  E.g., the "Study
for Player Piano No. 12", also known as "Flamenco Study", may be found
under http://www.youtube.com/watch?v=6bct4T9Ikl4
 

Or watch this totally hyped Boogie-Woogie:
  http://www.youtube.com/watch?v=pp2dWEYRzKY
 

Walter Tenten
Linnich, Germany
http://www.musica-mechanica.de/