Most demos or clinics are dependent to what the sponsoring music store can supply for the event. Looks like the event was held in a gym. They had to bring everything in for the demo/clinic. I hosted several clinics by Yamaha and Korg when I was selling PSR-S900's/Motif ES and XS/Korg Triton Extreme and M3.

1- Top end CVP
2- Tyros 5
3- PSR-S970
Stands and cables

No more room for a semi big Yamaha Sound System. They just brought the Bose because it just fit into the van.

Still fun to watch... Dutch or German or English!!