I actually have permission to teach all of what is on the DVD. On top of that, I got Arnaud's permission to perform the Jennings-Chevrier 'Invisible Palm' as well. I personally asked him for these rights before I started performing it and had shot and uploaded the video back in 2007.
In my opinion, it's unfair and inappropriate to call any of these versions superior though. It's all up to what the magicians in question prefer and in what situations they perform. Since I personally can't perform the Jennings-Chevrier version in the impromptu, surrounded, stand-up situations that I perform in most of the time, I have to do another version.
I know magicians who prefer the 'Real Invisible Palm' and have put it into their acts and shows while being aware of the Jennings-Chevrier and other versions that would suit their situations fine as well. Similarly, I know people who prefer and perform the Paul Harris version instead. Can't blame them. From the spectator's point of view, the effects and premises still are exactly the same in each case, and different people like different handlings.