Airdash FDC stuff
You probably want to frame step through this on YouTube using comma and period to be able to easily read the frame counter (the dummy playback).
All the three runs input up, then wait two frames, then input dash. If you look at the counter for the dummy, this means the frame you see the up input is the frame it'll say "2" on the right. And on 5 it'll input the dash.
The first run just jumps and dashes. Jump starts on 2 and Ky lands on 51. Note his landing position with his front foot half on white and half on blue on the floor.
The second run starts the same, then holds 4PK starting on 11. (FD actually happens starting at 35.) Ky still lands on frame 51 in the same spot.
The third run is like the second, except it starts holding 4PK later on 18. On frame 28, you can see the first frame of startup of jP. On frame 29, it gets cancelled into FD. Ky lands on frame 45 and his foot is also completely in the blue.
Eddienput:
2+reset W12 4+dash W24 4+dash W40
play 8 W2 dash W40
W30
2+reset W12 4+dash W24 4+dash W40
play 8 W2 dash W5 [4]+[P]+[K] W30 ]4[+]P[+]K[
W30
2+reset W12 4+dash W24 4+dash W40
play 8 W2 dash W12 [4]+[P]+[K] W20 ]4[+]P[+]K[