Update: the ingame movies have been fixed! We had to sacrifice a bit of video quality for that, but now they're supposed to work for everybody no matter what their pc setups are.
If anybody got the movies crashed on their side, please tell us.
Hi. Try to change the compatibility of the shortcut to windows7 (right mouse button on shortcut ---> properties) OR try to enable "high DPI scaling override" (same properties ---> Change high DPI settings).