Remember that the vibration from glow, 4C or gas engines will produce horrible results on video.

Your best bet is to use a very slow flying electric plane.

Slow flyers work best, because they prevent you from jerking the camera around in the sky quickly...

Anyway, check out the FlyCamone Version 2.

While not super high quality, the price is right ( $99.00 ) and all of the accessories are available, though you don't need to use any if you wish.