I remember that Andrea Lively had a different spiel each of the two seasons. I don't recall the first-season spiel offhand, but here's my recollection of the second:
"Get ready for the ultimate video game challenge as these two teams go head-to-head with a maze of electronic obstacles for the right to battle one of our game wizards in the Video Zone! Fasten your seat belts*, here comes...Nick Arcade!"
* This phrase varied from show to show.