...down and then kept it between himself and TJ.

"Tang and Kansas State assistant Jareem Dowling alerted the game’s referees about the situation, appearing to point into the stands a few rows behind the team’s bench as they did. Tang then attempted to talk to Otzelberger before being quickly pulled away by the referees. He could be seen saying to the officials, “They’ve got three guys in the stands videoing our huddle,” on the ESPN+ broadcast of the game, before eventually settling down and play resuming."

That's all happening publicly in front of fans, players, media etc. To his credit he calmed down after the game and handled it well in the postgame handshake line and then in three presser after didn't take petty shots at the ISU coaches.