Their entire purpose for installing the interconnect was for transferring video files for editing. If that’s the only thing it’s going to be used for, there is no better test than doing exactly that. Iperf isn’t going to tell you the windows file transfer speed, only Windows file transfers will.

I hate the guy too. He’s a smarmy jackass that thinks he knows everything. I can’t stand watching him. Unfortunately even idiots get things right on occasion. This was one of those times.