Filmmaking is a combination of circumstances for sure. But, I don't think it is the case of glass here, we both bet ; ) To my eyes, the secret there is on post production, I'd say. Once he says he's not using any NR on post, I guess grading can help him out too. Without mention he refers he's overexposing V-log 1-2 stops in-camera, so maybe that's there a good trick to handle it. Have you already tested the tip?