While DJI may be the first name you think of when it comes to drones, it isn't the only game in town. You can also look at models from Autel Robotics, Parrot, PowerVision, and Yuneec. Others have dabbled in the consumer drone space and exited quickly—GoPro pulled its Karma after a rocky launch and poor sales, and 3D Robotics tried to get in with the Solo, but also gave up the fight to focus on the industrial and enterprise spaces.
Many manufacturers mount cameras inside the body of the drone. This is acceptable for casual photography, but if you want more professional results, consider adding an external camera mount, or gimbal. Gimbals allow you to place your video or still camera in front of the drone body, away from the vibrating motor and rotors. Gimbals can swivel and pivot, providing you with additional control over your imagery.