In sims, helmets, that hide the cockpit, are mostly disabled, and there's no eye motion to easily see your mirrors. What we see in the videos is only the head motion.
I was just going to ask the same. I love that ISI are starting to provide more settings in-game instead of messing with text files (framerate limiter next please ) and I'm really curious on how the new 5 or 6 movement settings work. Also, ISI introduced a cockpit shake setting around 3 builds ago. It was based on a 0-100% slider. It's now gone again