He doesn’t have any case for the disallowed goal. It’s offside from every angle. It doesn’t matter what angle they use, the system takes account of the parallax errors so all the angles match. The system is literally designed to match up all the angles, that’s why they have multiple calibrated cameras pointing in different directions. It’s a totally deluded bollocks statement that shows an ignorance of how the technology works.
You can see the angle ETH wanted them to use the angle is sloping in the opposite direction (you can tell from the lines on the pitch) so he would still be clearly offside.