A snazzy approach for sure and props to her for the application.
The problem I see with it is that in order for the tubes to properly remove contaminate from the water, they must be in thinner tubes. This, in effect, allows for the proper utilization of UV radiation without restriction from man made energy sources. Avoiding consumption of already thinned resources to stretch another resource is not an exponential solution.
That in mind, the final apparatus (as designed in the video) loses practicality for large scale purification and consumption of the resource.
You would (literally) have to build thousands of these tubes to purify an appropriate amount of water to feed even a small, stricken area.
So I really don't see it at this stage making it into humanities, but I can definitely see it making it into private sectors. Outdoorsman water filtration, but example.