Marik von Rennenkampff (mvonren) pulled up the wind map from that day and, if this is a balloon tethered to/near that car on the ground, the relative position of the balloon to the car would make sense. The balloon would be to the left and closer to the camera than the car visible on the ground. There was a ~7.5mph wind to the NE, and the car filming is driving E. This is southern california, just NE of Los Angeles, in summer, so the sun in the morning is very E. The article says the video metadata says the video was taken at 7:08am (localtime, UTC-7) on Aug 4, 2020. The sun would be at an altitude of ~12º, and an azimuth of ~77º (slightly N of E).
Which essentially is what is seen in the video. The angle to the sun is not exactly visible in the video because thte sun in is never in frame, it's always off to the side, but it looks roughtly in the same direction as the road, meaning the car is driving roughly E. A lot of the roads in that area are a grid, either N/S or E/W, which would make sense.
Long roads mostly aligned to compass grid:
So we know the car is driving ~E, the sphere is SE of the camera, and the wind is blowing to the NE. The sphere is slightly E of the parked car. The N/S is harder to judge because distances to blobs in the sky are hard to judge, but it also appears to be solidly N of the parked car (closer to the camera than the parked car). You can see how the 2D left/right alignment of the balloon to the parked car decreases as the filming car continues to drive E, meaning some of that offset from earlier in the video was actually a N component, not just an E component.
So if the sphere was a balloon tethered to the parked car, all this would make sense, since the wind would be pushing it that direction.
There are numerous points in the video where power/telephone poles are visible, but the video is so low res and far away from them that you cannot see the cables hanging between them. So I don't put much weight in the witness saying they couldn't see anything tethering the balloon to the ground. It would be hard to see.
Here's my (very) rough sketchup below. Sketchup allows you to render sunlight and shadows based on a specific datetime, and all of it checks out with the video. The very left edge of the balloon is illuminated, rest is in shadow. The left side of the parked car is illuminated, rear is in shadow.
Personally I think it's very obvious upon first look that a tethered balloon is a likely explanation, even ignoring the possibility that the car on the ground is involved. I don't know why people think videos like this exhibit anything related to some hypothetical phenomenon of unexplainable advanced aircraft created by NHI. Other than the fact that it is a blurry sphere-ish thing in the sky that the witness failed to identify, which seems to be all it takes.
