I will admit that I didn't look at the videos after reading all the comments, but people and plants have lived on this earth for thousands of years drinking any water that is available, well, rain, rivers, streams, lakes, you name it. What worked for our grandfathers can work for me. Our water is very hard here, and we have a water softener. Because of the salt, I water my plants with the outside water. I drink the salted stuff. You can't taste it, but I salt my food, so don't see a difference. Charcoal filters will purify water as will the seeds of Moringa Oliefera. I buy and drink bottled water when I'm on the go, but when in the house, I cook with and drink tap water.
JMHO,
Suzi