I tried again and found that the two best settings keeps all of my cpu buzy so my question is only valid for the two fastest settings.

If I get it right the current videorendering is singlethreaded, correct?
Have you considered to parallelize the videorendering to cut down the rending time? I have not checked the code but maybe streams as mentioned on https://stackoverflow.com/questions/27558605/java-8-parallel-for-loop can be of ...

Right. Thanks for the answer and sorry to bother for something that simple.

Is it possible to set the geographical location for a project? For a project I set the compass rose and then when rendering an image or a video I can set date and time of day. But can I set geographical location also? I am thinking this could change the light quite a lot.