You'll want a "hardwire kit" to do this. Use only the Viofo ones as their cams needs a more robust power source than is usual. Available directly from Viofo.Lots of info-vids about instaling on YouTube. Not hard to do, just remember you'll want to use "fuse taps" wherever your tap in on the fusebox; you will need to know what fuse type your car has when getting those.
That should do fine. You can find which type of fuses your car uses in the owners manual and it's usually also listed on the fusebox cover or sticker showing the fusebox layout.
Phil
That seller @estore009 is an active member here; you can ask them or make inquiries on Ebay. I didn't see anything on the sales page to indicate anything.
You can also pull one of the fuses out of your fuse box and use it as a guide to relate to the type it is. Do a search on the Internet for picture of auto fuse types, heck, here you go. https://en.wikipedia.org/wiki/Fuse_(automotive)
That control box on the hardwire kit viofo sells, it controls the amperes output as well right? If I'm going to piggy bag the power outlet which is 15A, it won't be supplying that to the camera, right?
The dash cam will only draw the current it needs to work approx 1 Amp.
However if your dash cam had an internal failure it is possible it could draw the maximum current that line supplies. (15+amps in your example)
That's why you place a fuse in the circuit.
It prevents the wire from melting or catching on fire and will blow the fuse hopefully before the dash cam completely gets destroyed.
As far as the box goes it depends on what smarts are in it. It's main purpose is to prevent the car battery from going flat if your dash cam is on while the charging circuit is off. Eg. Ignition on but engine not running.