These videos are about the building of the World’s largest solar power plant called Ivanpah.
It is being built in the desert between Los Angeles and Las Vegas by a company named BrightSource Energy and it will supply enough electricity to run over 300,000 homes.
Here is a link to their website http://www.brightsourceenergy.com.
Its nice, solar is very important to the future. As of now, solar power and solar related devices are expensive. But it may be reduced if most of the people start using it.