Something doesn't look right about that video. Those kids didn't even skip a beat when that lightning hit.
That's what first caught my attention. Most people would have been at least startled from a strike right there in your face. Also the sound from it wasn't instantaneous, there was a slight delay. I would lean more toward it being a lens or other reflection from a more distant strike.
No flash reflection from the wet road directly below or from the side of the vehicle. There was a small reflection from the vehicle up near the front though possibly from the strike some distance out to the left of the frame?