Agreed, I don’t think it is real, notice how the screen flashes right before the hogs run out.
I don’t know about this particular clip, but it is a real phenomenon. Never seen it with wild boar (didn’t have ‘em where I grew up), but I’ve seen rabbits do it with my own eyes. No matter how many times you’ve seen it before, you never get tired of it, especially with hawks circling overhead waiting to pick the rabbits off when they make a run for it. Hawks are smart and almost inevitably show up when you’re about done, provided you’re plowing in concentric circles from the outside in.