As soon as you enter the first building of the first level, the screen will go (mostly) black and you can't move anymore. I could reproduce this bug consistently. How this is linked to the intro videos, I can't tell. But as soon as I had restored them, the game worked again. It may be the case that only one specific video is causing this; I haven't tested that (yet). I also don't know, if other sections of the game are somehow affected.
I think this should be mentioned in the Essential Improvements. See also: https://steamcommunity.com/app/13600/discussions/0/1696045708642685539/