I’m a night photographer & I shoot a lot of bridges so I have experience in this area. You wouldn’t necessarily see cars on the bridge. Remember, what you are seeing is work trucks (higher than cars) with lightbars on their roof, that are designed to illuminate in all directions. In the video, you can see one of the work trucks lights reflecting on the water as it blinks on/off, that’s because it’s pointing towards the direction of the camera. The majority of a car’s lights are going only forward or rearward, not so much light out to the side; IOW, they’re not so bright. Also, look at this image from Google maps, The red car’s lights are below the level of the Jersey barriers; you wouldn’t see any lighting from this vehicle or a similar one in the video that was shown.