What the heck are these? Dust Particles with no wind? Strange Orbs in sealed car

I was going through my dashcam videos and found this. It was a few hours after we went to bed. The doors were sealed and the windows were up. You can see the brush and weeds in the background, there is no wind. Nothing was near the car like a cat jumping on it or anything. I am sure it's likely just dust particles but it's still pretty weird without any reasonable way to be moved. If anything it makes for an interesting video when you aren't expecting to find anything like this.

The inside dashcam kicks on when it detects movement, and the outside ones kick on when they detect XX amount of g-force when the car is parked and turned off. This is the only time this has ever happened, no other clips were found. I thought I would try turning it on every night before we go to bed just to see if I could capture it again and to this date, it hasn't happened. I even tried to duplicate it by leaving the window cracked one night, the door slightly cracked (which would leave the dome light on) another night, I even tried rocking the car holding the fender well, and nothing. If you have suggestions I am happy to try them. I would just like to know for certain what the heck it was. Anyone who knows me, knows I keep my cars very clean. None of them are without a wax job for more than 30 days. I clean the insides every Saturday or Sunday. The only dirt is stains on the cloth seats but who knows.

As I wrote in the video I will gladly give anyone the raw video file. I am certain it's nothing but I know some people are into these types of things so just hit me up if you want the raw, unedited, original resolution file. I can share it on dropbox for you.

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