D F# (DF#) (EG) A B A
"Wouldn't the middle pedal allow you to play unsustained notes over a sustained chord?"No. The middle pedal, the sostenuto pedal, can only hold notes which are already depressed before the sostenuto pedal is depressed. If there are moving notes in the RH, the ones which aren't initially struck will not have sustain. This is what the OP was wanting to happen. Also, usually the sostenuto pedal only affects notes up to C above middle C. And sometimes, not even that high.I think ELECTRICBOOBS (surely a not so clever play on Elton's 'electric boots' - in "Benny and the Jets") might be up a creek without a pedal on this one.
C B A B C D E F E D E F (DF) (DF) G (EGC)
C B A B C D E F E D E F G A B
It sounds like reverb in the recording to me, possible added in post production. Alternatively, pedal is slightly depressed instead of fully. But it sounds more like reverb to me.
The piano in the second video has a bright tone which, combined with the room and recording device, is creating a slight echo effect in the upper notes. It doesn't sound like he's using much pedal at all to me, and definitely not the third pedal.
if you want sustain - just use the sustain . Of course it would affect both hands, but hey, it's just rocknroll.
Besides, he probably used the sustain in the original recording, (was that on the album, "Yellow Brick Road"? ) Check it out!