As a musician as well, I was blown away by both of these performances! It's amazing what practicing can do!
Sadly, so much of today's youth can "text" faster than a speeding bullet, but will have no patience to actually sit down and learn to play a musical instrument!
I ws impressed with the thought that the musical score--the written music--for that second piece must have taken weeks to write, back in the composer's day, with ink well and fountain pen! It must be the size of a small book! There's a lot of notes in there! LOL!