Thanks Landsailor. It's always good to see different approaches and ideas.
After spending a few minutes looking at this project and watching the video I developed several reservations about it.
As Leppy said the end coverage doesn't look great. The tarp looks very similar in design to an ENO rain fly but appears to be smaller length ways(could be just me though).
The bottle screw-ins didn't appear to have any screen to stop small particles getting into the bottles.
4 x 2ltr full platypus type bottles would add 8kg of weight to the fly. I wondered by how much the side angle of the tarp would steepen impacting the drainage, possible impact on rain protection for gear and what additional strain would be placed on the tarp fabric and suspension.
Contamination of the collection surface from bird poo (or even worse Bat poo) on the tarp and I wouldn't be keen drink the water even after treating (yeah, I know, I'm soft

).
"Heat reflective technology". I don't know how this would work under a tarp. Might be good while the fire is going but after that I can't see any way this would help. From my experience tarps aren't the warmest things to sleep under.
Cheers,
Michael.
One foot in front of the other.