While I don't see how it would work, and even if it did work after salting your
land, I just don't see much growing well.
In fact I am going to go so far as to say that in my personal opinion, the guy in the video is a fraudster.
It seems that hearing from some permies that it wouldn't work isn't
enough to convince you.
While I think this is bad advice, you can always run an experiment.
Purchase copious amount of sugar with you hard earn cash, bury it in a hole.
Then come back a few months later and let us know if a spring has now appeared. Compare you plot to you family/friends plot nearby, both before and after.
While sugar is bad for your land, it is only temporarily, adding salt to your land just seems 1000x worse.