i use my tripod inside. Just put your rear seat down. Put one leg back and 2 behind your seats. So the one in the rear is kinda short, but the 2 that are behind the seats are extended more. Then take 2 or three ratchet straps and tighten it down so its solid and doesnt move. And there you go, reachable from the seat, and in the center of the car.
You can even adjust your mirror so you can see the camera lens, so when you watch it, you can see your eyes in the mirror
Heres a pic from my moms honda. with the camera panned to the left.
