For my birthday I got a "Action camera". My intention was of course to adapt it for rocketry. The downside is that its a bit heavy, 200gr. But it is robust, shock and water proof, which is good. You'll never know how your rocket will land.
The mirror is attached with epoxy putty.
One or two minor changes is needed. I'll put a plexi "window" to reduce drag, and the camera bay has to be painted. Probably this configuration will be flown on G64-4W.