Some comments on its creation:
The suburban neighborhood interviews were shot at one of the producer's parents' house, (they were both interviewed in the final product) and the forest scenes were shot in one of the other producers' parents backyard. We'd drive up after work, stage the tents, piles, and sticks, and shoot everything on Mini-DV.Yes, it ends in the basement.
The live-action Mystery Machine was on a promotional tour of Canada around that time so some of the producers flew up and shot that footage in a day.
The press conference was shot in a conference room right off the cafeteria in the middle of a workday. The deputy in the background was played by a programming exec who's developed a lot of your favorite shows over the last twenty years. And bunch more of us around the office did the voices of the press shouting questions.
Related, there's a new Scooby-Doo movie featuring Bobby Flay and Giada De Laurentiis: