A Deer- a Wolf- fairly big animal... Doesn't really matter- as the showed ½ second of something fur covered and big enough to make a 'thud' and change the cars direction off path.
The first clue for me was the deer flying off to the side . The second was the dead deer laying in the road. Seeing that I live in Minnesota and have seen my fair share of dead deer on the road, and have hit one myself, I'm guessing it was a deer.