The typically straight-laced Cousins was shown wearing a large chain and glasses while shirtless and awkwardly dancing while surrounded by teammates after the Vikings' 20-17 win against the Washington Commanders, his former team.
One teammate is heard yelling, "you like that," while Cousins dances, a reference to a line shouted by the quarterback after leading Washington to a comeback win in 2015, which he repeated in the Vikings' locker room while counting down the team after Sunday's game.
Numerous Twitter users reacted with humorous responses to the video on Sunday.
Cousins threw for 265 yards, two touchdowns, and one interception on 22 of 40 passing during Sunday's win, which included a game-tying 12-yard pass to Dalvin Cook with 7:46 remaining and setting up a 28-yard game-winning field goal by Greg Joseph.
The former Michigan State standout spent his first six seasons with the Commanders before joining the Vikings in 2018.
Sunday's win marked the first time Cousins had returned to FedEx Field since signing with Minnesota, having previously defeated Washington, 19-9, in a 2019 home win at U.S. Bank Stadium.
"It kind of made me emotional going in on the bus, just thinking about that and where things have gone," Cousins said via ESPN. "I'm just so grateful I got to play here and play for the coaches I did."
The Vikings improved to 7-1, which ranks behind only the undefeated Philadelphia Eagles for the best record in the NFL and NFC.