Yang option select help

I do not yet own this game, but I just learned about option selects. I would like to know how it is done. I watched this video to see if I could get any ideas but I do not know what he is doing here http://www.youtube.com/watch?v=P_x0PuSJhI4
Can someone guide me through this and teach me how to do option selects? I know the definition, I just dont know how to do them

First ones are just safe jumps. Only the last one is a safe jump and he mentions the exact inputs.

:d::lk: :qcf::lp: :d::df::lk:+:lp:+:mk: