Piano evolution, history of keyboard instruments:
00:00 From the clavichord to the modern piano with David Schrader, by BaroqueBand
16:06 The history of the piano with Liberace
30:22 History of the keyboard
36:31 A brief history of the piano, by Sounfly
39:54 The first piano by Bartolomeo Cristofori, by Gist piano Center
42:54 A brief history of the pianoforte, by BBC Radio 3