I don't have sound at work, so I couldn't listen.
As for the toxins, in water, it's dilluted. Captured, it's concentrated AND takes up physical space that isn't simply dumped back into the water sytem. Whether it's used bandaids, direct human wastewater, or industrial wastewater, it's hazardous, so my definition is broad enough. Because all that funk is already in the water, it's already not laughable. This isn't some coffee filter or Brita filter that mostly deals with treated USA tap water, it's pulling an insanely high concentration of suspended solids from funky water.
To utilize this technology in a sizable capacity that could service a community is a steep initial cost. To manage the solid waste of accumulated filter media is an additional problem and cost. Incinerate/bury/pile it? Countries have a enough trouble maintaining their existing water treatment facilities to any standard for whatever geographical reach they can afford.
So far it just looks like a neat product to pickup at Wal-Mart.