thank you very much for your response with your experience you avoid me a purchase equal to me too, I found a converter model (ie I found its instructions) that does what we need but it is discontinued and unobtainable used, then on ebay I found this VGA2SCART - VGA to SCART converter (RGBHV to RGBs) which also works at 31 khz so now you have to find a scaler from hdmi to rgbhw (which the fury 3 does) I just have to understand if at 31khz?

I wrote to the guy from VGA2SCART - VGA to SCART Converter (RGBHV to RGB) to ask if my thinking is correct. i will tell you the answer here.
I found a YPbPr to RGB SCART transcoder / converter I purchased was the last one (fury 3 from a component output which I believe is YPbPr)

Maybe it helps you to have a look at the professional av/broadcasting solutions from e.g. Gefen, Blackmagic Design, Matrox etc.
They're built to do their job reliable(!) even in harsh movie production environments.


Here's a Google translated version of a german provider to have a small overview:
https://translate.google.com/translate?sl=de&tl=en&u=https://teltec.de/kamera-produktionstechnik-konverter-processing/?p%3D1

Examples:

1.) Gefen HDMI -> S-Video & Composite converter:
https://www.gefen.com/product/hdmi-composite-s-video-scaler-GTV-HDMI-2-COMPSVIDSN

2.)  Roland Video converter (discontinued, Example):
https://proav.roland.com/global/products/vc-30hd/

As you can see there could only be a small problem due to the BNC connections featured on many of the professional devices: You'll need cable adapters from e.g. the BNC connection (like the ones seen on the Roland device) to your TV / scart plug etc.

The problem is finding these equipments have been discontinued for years.

Gefen EXT-DVI-2-RGBSS this seems to be the best solution, ordered one.

I am a computer technician it is not a problem to build a cable.

Gefen EXT-DVI-2-RGBSS arrived € 100 ebay germany.
excellent solution! 1080P hdmi input scale to 576i you can see really well even the text reads well finally.
you have to build a cable with 4 bnc to scart,
give 1.5 volts (AA battery) between pins 16+ and 18 gnd if it is to make the TV recognize the RGB signal input.
I have to try with other devices to understand if you need to give a voltage for the FORMAT setting (16/9)
automatically but I don't think it's a big problem you can also adjust it from beo4.
I still have to connect the audio extractor and make the final cable.

then I'll watch a movie and put some photos of the finished work.