In another video, he got 1 year 10 months out of Nufinish. And 10 months out of Turtle Wax Ice, which I presume is now Seal & Shine.
Yes, I happened to see that video. As I recall (and I could be wrong) he thinks the NuFinish issue was due to either a bad bottle of product or possibly not shaken adequately prior to application. He was leaning toward a bad bottle of product because he claims to be very meticulous about applying the patches. I don't recall the Turtle Wax results and don't know if the Ice product is now Seal/Shine.