I'm going to Gardaland and Movieland Park in a week and I also want to film POV's, so I sent an e-mail to the parks to ask if it is alright if I take my GoPro with the chest mount on the coasters. Both replied and Movieland Park said, that it is okay, but I have to inform the ride operator befor I film the POV.
But Gardaland wrote it is not allowed! then I asked why and said again with the Chest mount, that it is safe and that some of Oblivions's first riders had that one too. They then said they were only allowed because it is a special event and it is a safety risk. But I told them it is safe!