It was just the Miller delivery guy saying, “High Life!”
It wasn’t a nationally televised spot and may have not aired where you are. Budweiser has the exclusive rights (for beer companies) to advertise nationally during the Superbowl.
That’s cool and all but… they both suck. Miller Lite, MGD, High Life; their time has come and gone. 25 years ago they were the shit but now they have 1 second commercials that most people didn’t see.