you dont really stop recordings, dashcams default start and stop with the car, but you can most often lock a event by pressing a button the camera.
Either way with a sufficient large memory card ( 64 GB at least ) you have at least 8 hours worth of footage with a regular 1 channel system, before the camera will start to delete the oldest footage to make room for more on the full memory card.
The simplest setup you plug into the cigarette lighter in the dashboard, and that is also fine aside for some new cars that socket are on all the time, but for the most it is a perfectly fine place to get power.
It is still recommended to check up on the camera and the memory card, every few months, even if you have the best camera and brand memory card, they still are not really set and forget.
But maybe you can do that when you visit with a laptop or a OTG memory card reader connected to your phone, on the PC it take me 10 minutes or so to look over a 128GB memory card .
What i look for is drive sessions ( identified by the time/date name of recordings ) start and end in locations you would expect, and that the files can play so you only need to play a few seconds of each file you inspect.
If recording sessions suddenly start to start a few 100 M from your dads place or end a few 100 M from it, or for that sake in the middle of some random road, you are having problems with something.
If your dad are anything like me, you will soon find that you are a creature of habit and drive the same routes over and over.
It is also recommended to format the memory card in the camera every few months, this reset the file allocation table that can get fragmented with all the writing and deleting of "small" files.
It is also recommended if you have a larger event to stop the car so the camera turn off and then pull out the memory card, or at least pull out the power plug ( most often a USB plug ) so the camera dont risk overwriting.
This is no problem as you will not be driving further anyway.
If it is just a little thing and you are still mobile, as long as you dont drive for hours on end the event should still be safe with a larger memory card, or you can lock the event ( just seconds,,,, 30 - 60 or so, though some camera do save event files as whole 1- 3 - 5 or 10 minute files / what ever you use, most of us use 3 minute file sizes ) that will safeguard the actual event itself, and if not used for more act as a beacon for footage of before and after which will still be in and among the regular recordings.