1) The video tries to tell s that an object is not only limited to its main purpose and can be innovated for another use. Same goes with space, a space can be multi-functional and can be used for a few different purposes.
2) When living near a lake, he was inspired by all the little boats and how they were able to contain so many things into such little space.It inspired him to try and fit things into a limited space.
3) Simple tings can sometimes have more purpose and use than an expensive object that was designed specifically for one purpose. Simple things are also easier to innovate and can be multi-functional. Hence, sometimes simple and smaller things can be more useful and sophisticated.