I've worked many security jobs over the years, guys like this are very common, but most aren't as stupid as this one was.
I also know people who have worked at TCF, the are strictly forbidden from any contact unless it's an emergency, or in defense, they are merely for show down there on the field. The cops on the other hand are the muscle.
Pretty obvious this guy wanted to feel big, you can even see him try to hold back his arms so he could claim that the students "ran into him", the worst part about security guys like this is working WITH them, because you are going to be constantly reigning them in while simultaneously dealing with whatever situation you are dealing with.
We called them "Farvas" from the movie Super Troopers. Glad he's fired, glad his coworkers did the proper thing and surrounded the goalposts and helped people stay safe.