Welcome to the forum Betro81.
That red one
you dont get that setup here in Denmark thats for sure, look pretty sweet
i guess you could call that taking a dump in a big way
99% of trucks here is flat nosed ones as that count as part of the MAX total length, so better to have that "realestate" out back where you can make money on it.
It is hard to get side coverage of a vehicle like that without installing cameras outside, maybe on the mirrors, and out back is even harder.
For the back it almost have to be a stand alone system so you could just power it off the rear light, but then you would offcourse have to go there to retrive the memory card once in a while.
Allso out back a lot of wind and dirt is flying around, so you will have to clean the lens often, depending on the stuff you have been driving on offcourse.
For the side you could allso have a camera in each side of the cab pointed at the mirrors, that way you at least get some of what is going on down the side of the rig.
Problem is there are only a fjew dshcams with a waterproof camera, the top among those is proberly the SGZC12RC thats a camera on a wire setup with a main unit for housing the bulk of the electronics and the memorycard.
But the SGZC12RC also dont come cheap, then again none of the good worthwile dashcams are cheap.
You can get some 4 channel DVRs but those use analog cameras with resolutions so low its hard to buy a screen that can display that low resolution native.
So that route is not somthing i would recomend you, i have tried it myself in my car, and i quickly moved on to 1080p cameras.
Only real + with the analog systems is some of them house a harddrive as storage, and that way you can have several weeks of footage on it, thats not somthing you can do with the regular dashcams as they all support SD cards for storage, and big SD cards ( 128 - 256 or 512 Gb cards are pretty expensive )
Allso the dashcams are not 100% set and forget, its a good thing to retrive the memory card and inspect it once in a while to make sure what is on it match what is driven in the vehicle, allso its a good thing to format the memory card completely to "reset" the file structure on it.
Personally i think i go over my memory cards every 2 weeks or so, offcourse i dont go thru all the footage on it, just look at the time / date names of the files, and then look if the last files recorded in the sessions can be played with no problems.
Loading the files into a pice of software like registrator viewer will allso out any corrupted files, so thats a quick and easy way to do that as registrator viewer bundle up all your driving sessions into 1 large file on its own and then sound a alarm if any of the individual files have a issue.
Sad thing is the Russian author of "RV" was killed in a MC accident last year, so unless some one pick up his good work it will soon be abandonware.
PS. later this year we should see dual systems with 2 cameras on wires, and a main unit that will be easy to hide / secure, than again those will not be cheap as thats high end stuff.
This is what you will be getting with a analog DVR system with low resolution cameras. ( video at the end of me rambeling on in Danish )
This is what you get with four 1080p dashcams in a little red car.
Please note my camera in the left side was a little out of focus that day, when set the little mobius cameras are nice / "cheap" little cameras.