cool video and some nice shots . Can I offer some advice ? ( I have a Phantom 3 pro myself)
Try to add shot variety . Get some shots with the subject (in this case your truck) coming towards the camera. Add some elevation. Try to keep the subject in the center of the frame. You can adjust the gimble motion speed so that the camera moves/pans more slowly , this produces less jerky camera movement . Those lateral shots like you had at 4:35 are killer. Lastly , variety . Terrain variety , subject variety , time of day variety , all those variable add up to an interesting video.
Hope you don't mind the unsolicited advice , just some things I've learned with the Phantom . It's an incredible little machine ....