Geez, those Youtube comments on the Styx video.
Fwiw Styx 1 (and seemingly this too) suffers from a couple of things that made it an extremely hard game to ghost. The controls were pretty awful (I didn't know you could hang from a ledge until I read something about it, you literally have to inch your way towards a ledge, otherwise Styx will just jump down). The enemy vision cones were super wonky and the enemy placement sometimes was just flat out terrible, making it almost impossible to bypass an enemy without somehow tricking the AI into starring at a wall.
Not saying Brad played amazingly or anything but if your not super into stealth games Styx doesn't make it easy to look good on video.
At least Styx 1 was, it doesn't really look like this fixed a lot of my issues, but I haven't played it.