As a human, you will see this often and usually react, but the time between seeing and reacting will vary, and sometimes you won’t see it at all, or not until it’s too late to do something defensive.
FSD will literally never miss this ever, it will never see it late. It will be at the same exact level of awareness all the time, which is higher than your own awareness at all times. It will react faster than you every time, and will never miss this.
It doesn’t come through in the video outside of watching path planner and speed limit drop, but I felt the jolt and swerve right in the car as this oncoming vehicle swerved into my lane. FSD was evading before I even knew why.