All dashcams need to be connected to the car's 12v system, preferably to a source which is only live when the ignition is on; that means the camera will start and stop automatically when you drive. It is usual to route the wire from the camera across the top of the windscreen (tucked underneath, so it doesn't show) and then down the pillar (again, it can be put behind the lining) and connected to power under the dashboard.
I have a nextbase 512G for the rear and that is pecfectly alright at night. I also have one of these at the front
Amazon.co.uk User Recommendation
and I am quite happy with that also.
The nextbase 512 comes with a polariser filter which allows you to remove reflections from inside the car to improve night vision (the one you are looking at doesn't look like a filter can be fitted). The MAISI doesn't come with a filter but I was able to fit a standard photographic polariser to it and it really does make quite a difference.
I don't think you HAVE to use anyof them with a mobile - you can remove the camera from the car and connect it to your computer or just remove the memory card and load that into your computer.