I want to believe it's a ghost. More probably that it's someone who want to take its own life. Or perhaps it's the ghost of someone who took its own life once. A normal person crossing the road would have seen the cars head lights from long distance.
The murky / misty / ephemeral mass seems to be centered above an object lying in the road - the object to which the red arrow points in this frame image:
That object isn't a lane or side marking of the road itself. It's in the middle of the lane in which the vehicle is traveling. If you step through frame-by-frame you'll see this linear object isn't aligned with any of the road markings.
I think it's most probably something lying on the road.
If you continue "forward" frame-by-frame you'll see the grey mass above largely, but not completely, obscures this linear object as the vehicle passes by. The grey mass is therefore translucent. There are two bottom-most edges to the grey mass - one to either side and paralleling this linear object's long axis.
It appears to me that the grey mass is mist or smoke associated with (rising from?) the linear object.
Another thing bothers me. If you back up to 0:11 and then step forward frame-by-frame you'll see that the driver starts to steer rightward in the very same frame as the grey mass becomes first - and very dimly - vislble.
Nobody can react to first sight of so vague and dim an image that quickly.
Coincidentally there appears to be a rightward turn-off / exit the driver passes by at exactly the moment the grey mass first becomes visible and the vehicle noticeably starts steering to the right.
It appears to me the driver's evasive move occurs too quickly to be a reaction to the grey mass ahead, but could be reasonable for responding to recognition that (e.g.) the exit being passed (and having already been visible for a few seconds ... ) is one he / she should have taken.
Finally ... The headlights' range of illumination directly out front seems unusually sharply delimited, and it "shrinks" back toward the vehicle at precisely the same frame the grey mass becomes visible and the vehicle is already starting to veer rightward. This compression of forward illumination might be explained by stabbing the brakes and causing the vehicle to "dive" (duck the front end lower).
However, this would also mean the driver magically hit the brakes
and starting veering at the exact moment the grey mass first became visible.
Nobody's that fast.