I myself am looking for a Wi-Fi backup cam with night-vision and the colored "guide-lines", and I have about four prospects after sorting out what looks like crap according to customer reviews. In doing this search, I came across something I might recommend, although I have no personal experience with it . . . . lemme see . . . jis a minute . . . OK . .
Dash Cam front and rear
This was an "Amazon's Choice" item. However . . . consider any of several from the Amazon offering:
Zillions of dash cams From Amazon
Many of these have thousands of customer reviews, with 4.5 to 5 star ratings. You won't have trouble finding items to choose from (compared to my quest for Wi-Fi backup cams). You'll just be stuck for a while comparing and choosing.
HOW TO HOOK IT UP? I've been through the hoops on this, but it's fairly easy.
If the camera kit comes with a cigar-lighter "penis-plug", no matter. For maybe $10, order a cigar-lighter "splitter-extension cable" like this one:
Cigar-lighter splitter extension (4-foot)
Cut off one of the female connectors with its wires at the male plug -- put aside the remaining assembly -- you may want to use it for something else, or even for testing your dash cam from the cigar lighter. [Sometimes, worn car cigar lighters don't provide good connections, so the cable comes in handy for that.]
I think the wires on the splitter are 12-gauge. You may want to extend them -- and split apart the black and red. Find one of the ground points in your engine compartment, get a crimp-on "loop" connector, run the wire through the firewall and secure it with a bolt that holds all the other grounds.
Then, pick up a 99-cent fuse tap like this:
Brass ATC fuse-tap
OR -- you could get a "piggy-back" fuse tap with a red-wire tail -- look 'em up -- you'll know it when you see it.
Here, you could use the brass fuse tap on the DRAW side of the Accessory fuses (cigar lighter, audio, etc.) and probably get by fine just using the fuse capacity of the existing fuse. OR -- you could use the fuse tap on the LOAD side of a fuse, and get a fuse-holder-with-red-wire to fuse it separately -- connecting to the DRAW wire of your device -- your dash cam.
You could also insert a rocker switch for your dashboard into this equation, so the dash-cam just doesn't come on automatically when you turn the key. You'd then have control from the driver's seat over the dash-cam, and turn it off and on at will.