Having just listened to that video, I'd say that they belong more in the Power Metal category than the Thrash or Glam that you suggest. My simple classification method is - if they try to sound like Helloween then they're Power Metal. That's no bad thing either! Here's some Helloween for comparison: [video=youtube;_9h3jRaZyB4]http://www.youtube.com/watch?v=_9h3jRaZyB4&feature=related[/video]
AudioSlave: Like A Stone [video=youtube;7QU1nvuxaMA]http://www.youtube.com/watch?v=7QU1nvuxaMA[/video]
Shot Down In Flames by Mary Elizabeth McGlynn Mary Elizabeth McGlynn : album, Silent Hill: Origins Song, Shot Down In Flames [video=youtube;2NGDwfDGBrM]http://www.youtube.com/watch?v=2NGDwfDGBrM&feature=related[/video]