Tonally—and in a way that I find endearing—this is one conflicted trailer, but the mod that it's trailing is impressive to the point that Dying Light (opens in new tab) dev Techland is raving about it. Harran The Ride is a new map with a brief campaign created by Cabozzl using the Dying Light Dev Tools (opens in new tab).
This Harran sports an abandoned theme park ride in which a handful of survivors are hiding and naturally besieged by infected. Cabozzl has single-handedly designed the map, new cutscenes and custom weapons. There's even voice work, although that's often a worrying prospect in a mod.
Harran can be downloaded from the Steam Workshop (opens in new tab) (where it's enjoying a hearty five-star rating), and while I don't want to spoil anything that its developer has intentionally blacked out, the full description is worth trawling for details on some delightful environmental threats.