The form is very important to play piano, I think.
We can notice that we use 3 positions of hands for playing all scales & arpeggios.
Then, the seat of height is also important.
Sonata k.330 C major Mozart
C major demands round form for fingers basically.
https://youtu.be/Ds54uyHOT_I
On above example, player's elbows are lower than hands and fingers almost are extended.
https://youtu.be/kpDkOuZPktc
On above example, player's elbows are higher than hands and fingers are rounded.
https://youtu.be/9O2VxbQQkFE
On above example, player's elbows are higher than hands, but fingers are not very rounded. The tempo isn't very fast.
https://youtu.be/-V4bGocFwnE
This example looks medium.
https://youtu.be/p9YlP7auUjw
We can't observe this example. But his seat height is very low and elbows are lower than hands. His playing is very interesting.
https://youtu.be/g1d4VKb5WNA
This example is fast. His elbows are almost same height to his hands. Finger form isn't round.
https://youtu.be/L6Kxm0y-X2g
The elbows are almost same height to his hands.
https://youtu.be/JT-6qET1lKE
The elbows are almost same height to his hands. The Form of fingers isn't always round.
https://youtu.be/uN4FwiuA5Vo
This piano looks period one. His elbows are almost same height to his hands.
High elbow than hands and round finger maybe fit to playing speedy.
We can notice that we use 3 positions of hands for playing all scales & arpeggios.
Then, the seat of height is also important.
Sonata k.330 C major Mozart
C major demands round form for fingers basically.
https://youtu.be/Ds54uyHOT_I
On above example, player's elbows are lower than hands and fingers almost are extended.
https://youtu.be/kpDkOuZPktc
On above example, player's elbows are higher than hands and fingers are rounded.
https://youtu.be/9O2VxbQQkFE
On above example, player's elbows are higher than hands, but fingers are not very rounded. The tempo isn't very fast.
https://youtu.be/-V4bGocFwnE
This example looks medium.
https://youtu.be/p9YlP7auUjw
We can't observe this example. But his seat height is very low and elbows are lower than hands. His playing is very interesting.
https://youtu.be/g1d4VKb5WNA
This example is fast. His elbows are almost same height to his hands. Finger form isn't round.
https://youtu.be/L6Kxm0y-X2g
The elbows are almost same height to his hands.
https://youtu.be/JT-6qET1lKE
The elbows are almost same height to his hands. The Form of fingers isn't always round.
https://youtu.be/uN4FwiuA5Vo
This piano looks period one. His elbows are almost same height to his hands.
High elbow than hands and round finger maybe fit to playing speedy.