This is a task usually done with HDMI capture cards, either PCI or even more expensive USB 3.0 HDMI capture boxes ... Once everything was figured out, [danman] was able to recover raw frames ...

Uni’s USB-C to HDMI Cable is an expensive-feeling nylon ... The 6-foot cable puts out 1920×1080 resolution at 60 Hz for a reasonable price. We like that the VGA end of the cable has thumb ...