but the output video signal is not NTSC or PAL since those kind of signals cannot drive a regular VGA monitor at least
There are monitors that can accept a 15kHz 50/60Hz RGBS/RGBHV signal over a VGA connector. There are also adaptor cables from a VGA connector to a SCART plug for connecting devices that can output such signals on a VGA plug to a regular European TV which can certainly accept such signals (but only rarely 31kHz VGA) via SCART.
(PAL and NTSC refer to color encoding standards, not video timings - an RGB signal does not use either of them, no matter what timing it uses)
Indeed, that's why I used words "normal" and "usually". For the rest, true, but I guess since even the basics was not well understood, I decided not confuse everyone to explain those topics as well. So I guess for this thread these details are "too much" for most people, what I meant.