At last... the Rach is at loose. Things will never be the same again.
Technically, not bad at all. You sure can play this music, no doubt about that. You deserve a better piano or at least a tuned one - this old honkytonk is no fun to listen to.
About your playing of the Rach prelude, can I offer some suggestions.
Most important, PLAY IN TIME. What you do here is not rubato, it's tempo anarchy, like doubling the speed for no reason, and not observing note values. Do not attempt rubato before you can play like a metronome. Practise Bach if you don't do that already (but I can understand youg people find that boring - I used to be like that). Do you have lessons ? If so, what does your teacher say about how you play this prelude ?
Almost as important - play the right notes, all of them, and make all of them sound
. There are quite some reading mistakes especially in the LH, more so than actual slips. You also leave out notes, and you do not apply sufficient weigth to them. This is important in Rachmaninov, every note has its meaning. Especially at the beginning and the end your chords sound very wimpy and uneven.
Pedal then. It is allowed and desirable to use much pedal in Rachmaninov, but not to keep it down for so long as to completely drown the sound, as you do in some places. Look at the harmonies and decide where to lift and retake it, to avoid unpleasant sounds.
The etude is a nice piece of work. Impressive beginning and ending, except for the very last bars which I found disappointing (as well as the part in the middle where you are not sure where to go). It could do with a bit more tidy performance.