Jerry Rig is the real deal. Not the first time he's been mentioned and he subjects all his devices to the same punishment. Whether you like the results or not is another issue.
Can't say he did the same test to the iPhone 6S. He used a razorblade and sandpaper, never used a glass cutter/picks. The overall components are a lot different also (AMOLED being full plastic compared to a standard LCD; neither will ever be subjected to flame). He also conveniently has never reviewed a 6S+ which could produce similar results. Either way, out of the many, many videos out there, his one is the only one demonstrating such an issue.