When I saw this video I was both convicted and encouraged. Convicted that I am not doing more to obey the call of God and share the gospel with all people; encouraged because God is at work in the world and He has invited me to join Him in that work.
renrutkram 
Hey Mark, If I could recommend 2 websites to you to share with your teens – Persecution.com and http://www.unreachedoftheday.org/. The first is sponsored by Voice of the Martyrs and is an anthology of persecution of the Body around the world. The second is as the website implies a site featuring an unreached people group every day. Hope you find these as useful as I have.