Amendment X

The powers not delegated to the United States by the Constitution, nor prohibited by it to the states, are reserved to the states respectively, or to the people.

Amendment 10 states that the laws that are not covered by the United States federal government, are to be covered by the state government or people of that state.

In this video, it talks about the 10th Amendment and what it means. Most of all it goes over states' rights. 

https://www.youtube.com/watch?v=BO8C266Yunk

In this youtube video, getting past the sound quality and bad music, the person shows what the 10th Amendment is as well as the difference from the 9th Amendment.