Hmmm, in the video, it says 2-5 minutes for that 1 cup of water from that giant barrel.
If my family uses ~10L of water per day, it would take over 3 hours for that thing to make enough water for us.
One of those barrels, being replenished non-stop could support 7 low active families. If we exercise or work outdoors needing more water, then we are talking maybe 4-5 families. If I wish to cook and clean with the water as well, let's say it can fulfill 1-2 families.
Now, at ~70L per day, how long with that thing, how long until you need a new one. Note that is is way too small and most likely already too expensive for any irrigation / farming.
I guess if it lasts a decade, 0 maintenance, 0 worries of no bacteria or poisons/pollutants getting through, having 1 per house, it might be a viable solution. These things will not supply a city, apartment building, farm, or any office building.