Can you share the documentary?
I've tried grounding my pots, but for multiple potz it was too conducive(for me) for the experiment to continue. Having multiple copper leads wrapped to metal stakes in pots with the exposed copper wire.. made the place feel charged for sure, especially when wet after foliar spraying.
I was literally shocked when wiring 3 potz together without the ground. So, i finished from the ground side connecting the rest of the potz. Over a period of a couple weeks, I noticed a vigarowth but I had assumed it was just from the nutrients and transplant. Didn't do a side by side, but perhaps will in the future.
If it was done with 1 to a few leads without too much exposed wire, i think it would provide the benefits of electron exchange from the potz to the ground without the electrically charged environment.
Curious if others have experimented with grounding..