With a few exceptions, it's hard to mount a camera in a scale plane so that it doesn't show, but still gives good video. The best thing is to get a plane that camera placement doesn't matter as a means to be anything other than useful. You're not really flying a plane so much as you are a camera
One of the better cameras in a scale plane that I've seen is one around here that has a camera inside a large cub. That big cabin really hides the camera and gives a realistic view out the windsheild. I'm thinking about trying my Mustek behind the guns of my Dr1