Good on posting a video demonstrating the idea. Well, my response to this would be the following:
1. You very much have unusually large hands. Nowhere was it written that Chopin had saucepans for hands, and so why would he compose something he couldn't play himself? At a full stretch, you might even be able to stretch a thirteenth from what I see, and that is not average.
2. You manage the tenths alright, but struggle with the elevenths. The problem is not in the stretch, but the evenness. Your descending runs, especially in the wider stretch, are very uneven, and the inner fingers clump together. This is because the extended hand position doesn't facilitate fluid movement since it restricts your ability to move those fingers downward.
3. You are noticeably struggling with the two easiest arpeggios of the Chopin etude, and struggle to get any sense of consistency when it comes to those, to play without flubbed notes and so on. Extended to the entire piece, that would make for a very shoddy performance.