Hi, you have to film your keyboard from above with an exact angle right straight above the keyboard. Afterwards there a some video editing software programms which can adjust the angle as well. I am still figuring out the perfect solution as well on my channel.
Moving this to general discussion - maybe there are some other users that can offer some helpful advice!
@Dalton Stephens @visualmusicdesign @visualmusicdesign My suggestion is, make a mesh modable grid for the notes falldown. That way, instead of distorting the video (which will lose quality, is better to leave it untouched) we distort smoothly the grid on which the notes fall.
You could then make a new point in the grid, and then move it left or right, with unlimited points, from 1 to n, which would flexibly mold the grid around them.