Thats not bad... however the only problem with the video is that the octaves must be played Legato and you can't just use 1-5 for each of them... there was a topic about using the best fingering to play them legato for an exam... The topic found here: https://www.pianostreet.com/smf/index.php/topic,34430.msg400002.html
Hello Ian. Thank you, I've tried it but I can't say that it solved my problem. Right Now, My Finger Numbers are this for all the runs:Measure 17 Run:455531111Measure 18:555521111Measure 19:555531111Measure 20:555521111Measure 21:555 3 2111
OK... Skorpius - are you playing this piece for an exam... are you being assessed on your performance??If so - you need to sort out the finger for Bars 17 - 21, because you CAN NOT use 5 and 1 for every octave note because they are under slurs. You have to play them as smoothly as possible. If you don't, then you're just cheating.
I think that is really a mis-guided mindset. What is cheating? If Rachmaninoff writes a certain fingering, which is very hard for one person, but easy for another, and the first changes it, but still achieves the same effect, is he "cheating"? If someone plays a scale in octaves legato, but using pedal, how is that cheating? It's the sound that counts.
Generally for leisurely learning - that's okay, but in an exam situation - there is a clear difference between the sound of someone playing the notes as legato as they can, and the sound made when someone plays it using the pedal. All I'm saying is that it is worth disciplining yourself into learning it correctly instead of taking little short-cuts. It isn't a mis-guided mindset if you're hoping to learn the great pieces of the pianistic repertoire and perform them publically, possibly for major recitals where you are being graded or assessed. It's okay to change the fingering, however if it changes the sound then you're going against the composers wishes... and in an exam situation you have to do everything you can to remain accurate to the composers score. And yes... as you pointed out - no-one really has the span to do 1-3 on a Bb octave, because that's physically impossible (for most normal people, no offence to the freaks that CAN do it), but then you have to try and minimise the amount of changing to the articulation. Putting down the pedal is NOT a good way to cover it - I discovered that through years of hard work having to correct my bad technique.
In a way that question is moot, because the thumb can't play legato with itself. It is only natural to use pedal to make legato octaves, because otherwise it sounds terrible to have one line legato and the other line the thumb just plodding along.