Pianist Billy Mayerl plays the largest piano in the world.
Titles read: "Now Pathetone has pleasure in presenting - BILLY MAYERL - the famous B.B.C. and Variety star on the world's largest piano". (may not be correct - timecode obscures titles on vhs copy).
Various shots of Billy Mayerl in white tie and tails, playing a huge grand piano. He tells us this is the largest grand piano in the world, weighing over a ton and measuring over 12 feet in length (piano is made by 'Challen').
He then plays a jaunty little tune - there is no paperwork for this issue so cannot find out what it is called.
Amendment May 2011:
The song being played is 'Ace of Hearts' by Billy Mayerl