I am not going to discuss the rationale of learning Chopin with Synthesia, if that is the OPs goal to learn advanced piano pieces without a teacher. But for me playing Chopin and any other composer is not about pressing the right keys in the right time, with the right speed and pressure. My only suggestion is - if you don't want to read scores - read performance commentaries, and books about Chopin's style, and historical context of his music.
My opinion is that you have to work on the structure of music, by paying attention to the left hand - Chopin was of the opinion that the role of the left hand for pianist is similar to that of a conductor in the orchestra. The other issues are Chopinesque rubato, how to make piano sing - Chopin transposed the tradition of bel canto to piano music, and pedalling which can be very tricky. Technical details are something that has to be addressed individually, that is why most people really need a good teacher. Of course you can also read books about piano technique - this one is very goodhttps://www.amazon.com/Piano-Playing-Motion-Sound-Expression/dp/0028722809
I am sure there are many more valuable books for autodidactics.
But frankly speaking, when I was reading Sandor's book, I was already instructed on several details of his technique by my teacher, and the other one introduced more details on differences in styles and touch depending on the period - baroque, classical, or romantic. There are also differences in the application of ornamentation between baroque, and romantic period, there are specificities of pedalling, and much more to learn from teachers. That is just more convenient way, than looking for each piece of information in academic, or professional sources.
Having said that, I wish you good luck with your attempts.