I got a plain old DVD recorder, a Sony RDR-GX335. There are so many varieties of blank discs and more than one recording format, so starting out can be quite formidable. And instructions are not written in a way that illuminates things before you try them out.
Basically, I have only tried the minus r formats, both a DVD-R and a DVD-RW. With each one, you can record in Video mode or VR mode -- and that instruction is the first place I ever heard of VR mode.
As your link attests, the VR mode is fully editable and fully incompatible. The result you get if you copy in the VR mode and then edit is similar to creating a perfect audio program with mp3 files, then handing it to someone with a standard CD player. It doesn't work.
Or you can record using the Video Mode. In that case, your entire editing facility is the PAUSE button. I didn't even seriously try that as I discovered with the VR mode that RECORD starts around a second after you hit the button, PAUSE pauses you about a half second before you hit the button, and the second PAUSE hit, where you resume, backs you up a half second to a second. That makes hot edits unlikely to be good, and even makes fade to black edits unpredictable. I got pretty good at it, and now have a perfect program that I can't play except on the recorder. It's finalized, so it's not that: it's the VR mode.
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
