https://www.theregister.co.uk/2018/05/31/car_chasing_camera_drone/

An American camera drone startup has come up with an eye-opening new feature for its products: automatic car following.

Skydio, a Californian upstart that makes, as its blurb says, "flying tools that free your hands and mind" (aka small autonomous aircraft fitted with cameras), has declared that its Skydio R1 quadcopter is now capable of following vehicles around while filming them.