This reminds me of one of the greatest pieces of ambient music of all time --- Justin Bieber's _U Smile_. It's old hat now, but just in case someone hasn't heard it...
That was very cool. Thanks for sharing. I wonder how people even thought to do something like this? It seems that it's at least a scene now based on the suggested videos.
Most of these videos I believe were created with Paulstretch, an open source audio time stretching application specifically optimized for creating nice ambient textures for very long stretches.
https://www.youtube.com/watch?v=bidHnEekXpE