Plenty of drone fans use GoPro cameras to capture aerial video. You want to add a GoPro to your racing drone? tahitianrider has shared a guide that shows you how to combine a racing drone with a GoPro gimbal to capture stabilized video at high speeds.
For this project, you are going to need a quadcopter, an action cam, a 3-axis gimbal system, and a 3D printer. You will need a couple of hours to complete this project if you have all the parts.