Sooo, I just did this for shits and gigs. I could only find the fifty-minute condensed version embedded below on YouTube (no full game). So lots of the regular sideline shots (during short timeouts, etc.) are not covered.
That said...think there might be something here. Not the best quality video, but there is one guy I noticed that looks a hell of a lot like Stalions to me.
He is wearing grey shoes, similar to if not the same as the ones worn by the "Stalions lookalike" in the CMU video. I didn't count a single other WM staffer wearing grey shoes or anything other than (what I assume are team-issue) black shoes with white soles.
I also haven't seen any other WM sideline staffer wearing the same long-sleeved tee that he is in.
He is holding what looks like sheets of paper folded in half.
In both of his appearances (at least the ones I could find), he is lined up on the 46 yard line on either side of the field. Which 46 he is on corresponds to what side of the field that MSU happens to be driving from on offense at the time.
As for the highlighter-colored signal calls on the MSU sideline, in the one shot I could find of them in the video (25:28 mark), where do you think they were lined up? You guessed it, right around the 46 yard line.
Below is a screenshot of the WM Stalions lookalike, video beneath that. You can find him in shots around the 26:11 and 40:49 marks.