Very nice! I recognize you from the use of the sostenuto pedal. You posted a Scriabin etude awhile back. Is that something you came up with yourself or that peculiar exploitation taught in Taiwan?
Thanks for watching! I think you meant una corda (left) pedal?
No, I was not taught to do that, it just my way of using it.
Basically I use the left pedal whenever I need a soft note, I kind of use it "note-by-note"-ly. (I don't know how to say that in English, I mean sometimes I use it on even only one or two particular notes, not necessarily on a whole section.)
It depends on the piano, too. My piano is 25 years old, so it has a very bright sound (stiff hammers), the una corda pedal dosen't soften the sound very much, so I'll use it more frequently on this piano.
Hope my English makes sense, if it doesn't you can correct me, thanks.