A user calling himself Fluxtrance, have made a fantastic map for Cities Skylines. He streamed on 28th of February. The island, the cities and everything is so well done. I am blown away.

Finishing Rhinestone Island Live

Beginners should Watch this
Here he describes about how he made this map. Also, he describes quite easy on how he films the cinematic parts of the game. So, if you have plans to capture or edit your cities made in this game then this episode is quite interesting for sure. Excellent Cities Skylines map for sure!

Source
Fluxtrance on YouTube