I guess maybe things have changed lately, but I got POV's on King's Island Racer, all of Canada's Wonderland coasters AND the Comet WHILE it was still at Crystal Beach! Didn't ask, but they knew I had a camera and what I was doing, and no one said anything including the operators. It was not a video but an 8MM sound film camera. I now have a Canon Elura DV (the first one, they've gotten cheaper since then) and tried it on the Clementsport NS "Tree Topper". One rough ride - and one messed up video! But the 8mm's turned out excellent! And I prize the Comet one. A real rarity from what I can understand. I've never seen another of the full ride, station to station, front seat, bright and clear.
garfent