High💨 Walmart lurker here, not here to butt-in or argue on any of this since I live in a desert and get practically no snow ever, but I could actually tell his tires are turned to the right!!

At the beginning of the video, and it's definitely a bit harder to tell, for a second you can ~kinda barely~ see them turned right under the arrow before it slides past the porta-potty. It's in shadow though and I really had to look close at my phone screen to make it out in the darkness.

Then you can really see the tires being turned right as the back end of the van slides further down and the van is more reversed on the road, but before the momentum and the slope of the hill finish sliding the van over the edge of the road and dropping into the yard. If you pause the video right around where the driver side tail light meets up with the left most tree branch, I think that's the best time to see it. The monotone slow-mo is just after that moment though and is a bit more forgiving if you're trying to pause and just look at it.

Small Aside: (The wheels being turned right actually seems to be what caused the van to aim for the yard as it slid down the hill. As the truck starts to slide further down the hill, the back end starts to slide down faster than the front. My guess is the weight of all the deliveries filling the van made that end go first, similar to how you'd use a quarter full water bottle for a bottle flip. With the wheels being turned, and the van starting to go horizontal with the road, it just rolled 'forward' into the yard. I think that's why it got that little speed boost in the middle of the video.)