Did you try emailing the guy who made that YT video?
He mentions that he's plugging a mono cable into a stereo jack, so he's likely doing something with that second connection inside his little box.
I'd take a peek inside your amp footswitch and see how it's different from the Live Wire (assuming you can get inside them without breaking anything, of course).
I'm pretty sure the Live Wire switch is mono-only, which MIGHT mean you can't do what you want with it.
It's not just good... it's good enough.