Very nice playing! You have a lot of clear articulation and layers of sound, both of which are very important to communicating the visual idea of the piece. My recommendation relies on the tempo--it is very nice and consistent, but there are some points where the tempo changes seem a bit abrupt, and I would suggest you toy around with flexibility in the tempo--more fluid, if you will (no pun intended). This is not Beethoven, and the pulse of the piece is the pulse of nature--it is not metronomic, like a heartbeat, but alive and changeable and flowing.
Likewise, I would suggest that perhaps you play around with a lighter, more legato articulation in some of the passages--I know it is difficult to do on an electric keyboard, and perhaps the story would be different if you were to make a recording for us on a grand piano, but all the same, I will leave you with this image: clouds of mist float past you, all around you, moistening your coat and dampening your skin. Can you reach out and touch the clouds? In a sense, yes, but you can't grab hold of it. That is what, I think, you should have in your head here when you play this piece--barely touch the keys, allow for lots and lots of pedal and reverberation, even dirtying of the harmonies here and there (once again, it is not Beethoven--we can mix our ideas up!). Initially, this may sound like terrible advice, but if you combine it with a VERY light touch, the result will not be offensive.
Congrats on a great video! These are just some ideas to consider; do with them what you will.