Well he ain’t getting ready to play the Ravel Concerto for the Left Hand. Based on his hand position I say he is about ready to play a Haydn Sonata... I’m hoping it’s Hoboken XVI no 44 in g minor. However, it’s probably the ubiquitous D major sonata Hoboken XVI no 37 that every student learns.
Still no matter what he plays... I would... and in a heartbeat,