The idea presented in this video is excellent in the very densely populated city areas where there is no room or/nor economic resources for standard windows. The idea presented here is also called: A liter of light.
There are numerous things to take into account when installing a solar panel system. In this case a 10 KW Solar Panel System was installed on the roof of the house.
This video is about saving energy. Even if you will not install solar panels you will be saving a lot of energy by using the guidelines presented in this video. Highly recommendable.