From TIME

“When James Madison penned the Bill of Rights, some worried that by writing some things down, it meant other rights were not secured. The ninth amendment attempted to correct that.” This video (02:26) is from the Your Bill of Rights series.

http://content.time.com/time/specials/packages/article/0,28804,2080345_2080344_2080383,00.html

Source

"In this series of ten short videos, TIME brings to life the words of the Founding Fathers and explores how these deeply felt ideas about liberty and property have evolved into the amendments as we interpret them today."