Update: I got a Yi, and was able to mount it to the rear view mirror. I've got all the cabling hid nicely. My issue now is I can't seem to find the right fuse to hardwire into!
I have tried numerous fuses, and only one seems to provide power (DRL fuse, 21 I think) but this provides constant power even when the car is off which means the dash cam will kill the battery. Every other fuse seems to not provide power no matter if the car is off, accessory, or fully on, no power whatsoever. Those who have hardwired a dash cam or radar detector, where did you tap into?