Don’t use the YouTube preset. Use the default preset instead. The reason why it produces such big files is to do with the GOP parameter explained here:
I have a problem exporting videos and I don’t know how to identify them or know what I did wrong.
First export a 9gb video and a 1:30hs duration. Cut some parts remaining in 1:20hs and without editing anything else I export it with the “YouTube” profile because I assumed that it is lighter. The video was 1.10gb.
The problem is that now I try to do exactly the same with another video (but with the same content, it is the recording of my screen of the same game, with the same characteristics, it…