Interesting, but no new ideas. These rain water management ideas are being implemented for a couple of years now in The Netherlands when developing new real estate.
What's your point? They acknowledge taking inspiration from another city where they already implemented this 20 years ago, that these particular ways of coping with climate change are considered proven technology, and that the only thing preventing more wide-spread adoption is political will.
Hopefully they steal good ideas from all over the place. The video mentions swales, which is a mainstay of permaculture, which has been tried out in various ways all over the world since the 70s.