A couple years back Unity released a video ADAM that showcased the rendering capabilities of the Unity game engine. Since then a company called Oat Studios released a sequel and today they released the assets used to create that sequel on the Asset Store. Additionally they released a EXE version of the trailer, that allows you to jump in as the video is rendered in real-time and relocate the camera. The asset packs include 3 of the characters used in the trailer as well as the environment they were rendered in. Be aware that the assets are released under different licenses, so be sure to check each license before you use any of this in your own project. You can read more about the released here on the Unity blog.
To learn more about the assets, see them in action, as well as seeing the real time movie in action, be sure to watch this video, also embedded below.