content: He made a made a soup of hydrocarbon chains from an unknown source plastic (I doubt he used the polyurethane from the beginning of the video). He then had to refine it with the help of chemists so we don't know what all they did to get the final product. This is not a verifiable source of this being possible or practical since the process was largely obscured and is extremely light on details. I still call bunk because it has no scientific rigor. We can make gold in a particle collider too, but it's not practical or efficient so it doesn't matter beyond principles.