I am not going to pass judgement on this video, but all I know is that a desalination plant is a waste of money and will use coal fired electricity to run it, and the North/South pipeline will be stealing water from irrigators and river systems that can’t cope at the moment.
Maybe this crazy idea just might work, but I think that giving everyone a rainwater tank would be a much cheaper solution. I will let you make your own mind up. Let me know what you think.