[Intuition]

So I finally setup my SGI Octane... and it runs great still... and I FINALLY sorted through the three different devices that I bought about two years ago in the hopes that one would actually work to convert the VGA Sync on green into a signal that would be recognized by one of the VGA to HDMI converters.

The winning combination was one of those cables that convert 13w3 sync on green to VGA... BUT... has the switches that turn off the Sync on green. This did allow one of the devices to see the VGA input.
The Extron RGB-HDMI 300A  did successfully take an input which could be sent out to HDMI and would read into a cheapo 4K UltraHD USB3.0 capture card.

Captured the desktop this way using OBS and then imported the clips into Premier... corrected the aspect ratio... and finally... I can make vids for my channel that aren't just a phone sitting on a tripod.

https://www.youtube.com/watch?v=HHkW_ZZfuhc

Now I can make proper vids for the SGI / Irix and the Software running on them.