Here's an upload of the stream from source (not from twitch), so the quality might be a little better:
(and NomNomGalaxy for those who are interested, it's a brilliant little game: https://www.youtube.com/watch?v=fzyS1ZAKJbc&feature=youtu.be )
Tech demostration with a bit of gameplay.
Time-lapse Recording of Day Transition
Demonstration of Town Lighting
Demonstration of Materials and Light