I went with this one for the Libby, and because it rotates a lot to accommodate a vertical glass I'll be adding one to the rear window too. I'm doing it because I want to catch the aggressive drivers on the roads in Atlanta (should an accident happen near me but not include me, I want to hand the cop some proof of their insane antics), but you could also use it on the back window of a truck to keep tabs on the bed.
https://www.ebay.com/itm/GPS-Camera-HD-Car-DVR-Dash-Cam-Video-Recorder-G-Sensor-1080P-WiFi-Parking-Mode/283512976933?hash=item4202b0b625%3Ag%3AZd4AAOSw4O5c~1Bm&LH_ItemCondition=1000
I have this one in the Durango. no reason that its different, I just bought it first and didn't yet know about the style I put in the Libby. both give good video.
https://www.ebay.com/itm/Anytek-X28-FHD-1080P-150-Dash-Cam-Car-DVR-Camera-Recorder-WiFi-ADAS-G-sens-W4H1/303255508978?hash=item469b6fd7f2%3Ag%3AKJEAAOSwVcFdMJIC&LH_ItemCondition=1000