Masten Space Systems conducted flights 13-16 of its XA-0.1B-750 VTVL rocket vehicle in a single day. This is Flight 16.
In this test the vehicle was programmed to fly side-to-side (a translation through space). The camera was on a tripod, zip tied to the frame, looking down.
The odd streakiness is scanning artifacts of the camera. You can tell that the vehicle gains altitude because the concrete stops glowing.