I recently got the nextbase 312GW Wi-Fi dashcam It's a good clear picture that can pick out number plates clearly and I can upload the content via Wi-Fi to my mobile phone, as I live in an area where a certain section of the population think crash for cash is a way to make a living It's a must these days.
The software that comes with it is very good indeed with tons of information when connected with your PC, plus one thing I've only just noticed is they have a section to directly uploaded dashcam footage to your local police force
I've not used that option it yet but was sorely tempted by one utter idiot a few weeks ago who drove like a maniac.
I uploaded a video to youtube of a trip around the block just to see the quality of the picture.