GoPro session mount.
Two editions, and multiple angle snap settings allow you to adjust the camera angle, and allow for compliance in the event of the crash which you totally won't have because you're a #dronePro, so that you don't shatter this into a million pieces.
Use zip ties to affix to your racer, and some foam or rubber to add vibration damping and snugness.
Three levels of camera security for three levels of people:
"Safety comes first and I love my GoPro" use the small attachment plate and 4 self tapping screws e.g. these fine examples of torx* superiority:
to secure the absolute shit out of your precious camera.
"I just sort of want to pop the camera in and out really quickly" don't bother with the security plate, just let the flexible retention clip do its job. prepare to print multiples of this part, because the tab totally snaps off if you flex it about 0.05mm too far. You'll get the hang of it eventually.
"F*** having money" snap the tab off, don't use the security bar, do clockwise barrel rolls over deep water or cliffs. perhaps consider ditching your quadrotor in the deepest part of a lake after exhausting your supply of gopros, where it definitely will not form an artificial reef.
If you found this using "drone" and your quadrotor isn't capable of flying itself without your input, that word really does not mean what you think that word means.
*this product not guaranteed to work with any type of screw besides torx, or torx.