Hi, just got my first mac and i'm really excited to be using imovie hd 06. unfortunately, for some reason, when i import short clips from my DV camcorder, each of them winds up being huge. i have about an 8 minute video and it's already using over 50 GB! even 10 second clips show up as using an entire GB each. does anyone know why this is happening? my hard drive won't be able to support much more at this rate... any advice anyone can provide would be greatly appreciated. many thanks.