rec'd a clip claiming a flat earther 'accidentally proved rotation' with a $20k laser — is this real or edited to make us look dumb

Someone DM'd me a cut from that Behind the Curve documentary, Netflix thing, and I can't tell if it's been chopped to ratio us. The guy is Bob Knodel, he's a real FE channel host, and he buys a ring laser gyroscope, like the expensive kind, twenty grand, specifically to show there's NO rotation. He ……