"Political power grows out of the barrel of a gun." -Chairman Mao
I think a "truth about" on Mao Zedong and Deng Xiaoping would be illustrative of the power of liberalization vs state control.
I know that the liberalization has slowed down since 2005, but I imagine there are a number of Chinese people who could be receptive to the message of freedom, through the object lesson of 1978-2005's growth.
A "truth about" might miss the mark with English-speaking people, and it might be preaching to the choir for those who lived through the reform period, but... it's hard to tell if it would be a successful presentation. Regardless, it would be an interesting video.
I would take this as inspiration: http://www.npr.org/blogs/money/2014/05/14/312488659/episode-337-the-secret-document-that-transformed-china