Saw that and commented Ruth-roh! Penalty for excessive celebration!. Our high school team was playing the SoCal favorite for the CIF ring, back in the day, and was penalized for excessive celebration in the final minutes. We DID win the ring, so the celebration became unimportant.
The NFL got rid of the excessive celebration penalty a while ago. Teams have been doing that photo shoot crap all year. I hate it but its legal. As long as you dont taunt an opposing player they let that stuff go now.