I got this one: https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1 from this thread https://www.ar-15.co/threads/155748-...light=dash+cam.
The video quality is good, but it glitches a lot and drops data. Right now I've figured out that when the camera comes on when I put the key in, once I start the vehicle, the rear dash cam actually locks up and only records sound over a paused rear video. It has options for 1, 2, and 3 minute loops. The truck crashing into the bridge that I posted today was part of a 22 minute video. I had to upload the entire video and cut it down to the relevant minute with YouTubes completely shitty editor. The only thing stopping me from buying a new, better camera is that it's such a pain in the ass to run the cables under the ceiling liner and behind all the interior panels for the rear camera.