@eva

My bet is that it has to do with the Video Delay actors you have after your two 4k videos that have the 'frames' inputs set to '21' and '30' respectively.

In the righthand side of this screenshot is some relevant info from the help text of the Video Delay actor's 'frames' input:

Try deleting the Video Delay actors and see if the LOAD drops.

Also what computer are you running this on?

@eva

@woland ok, now I try again, with another one, its also really loaded it seems but I am actually surprised.
I have put the scene in Q1This is the file: Esther

All the best

Eva