Several videos show pianists playing excerpts from pieces on different sized keyboards and discussing the differences. Two videos show actions and keyboards being interchanged in grand pianos – one during the Dallas International Piano Competition and the other by Steingraeber in its Bayreuth workshop.
https://www.youtube.com/playlist?list=PLHBn-VaaOCGewhr0Z0M6gU0VKpqrqrCo4
