I watched the video, looking for the moment when the sides of the muffins are no longer intact. It happened about the time the man was onscreen, but I didn’t see the actual stab. I think the step where they’re touched with big forky things is just shepherding them, not piercing them. Those stabbers are too big for the little holes in the sides.
Time to name your brand. I’m for Thomas’s Original.
@janbb‘s suggestion about the phrase “fork-split” raises a point. We tend to read “fork-split” as an adjective describing the muffins. But because of the peculiarities of English, it could be argued that it’s an imperative, telling you “You {must | should | can |may} fork-split these muffins” (are supposed to, expected to, obliged, encouraged, ordered, invited, etc.). I’ll bet their legal department has a formal definition of “fork-split.”