What is Secular Humanism?

I have struggled with faith for many years now. I really want to believe in something greater, but find myself constantly questioning. Life seems so very random. I truly envy those who find solace in their faith. I came across this video, narrated by the great British actor/comedian/writer/free thinker, Stephen Fry. In just 3 minutes, it shows, in a very entertaining way, something I can believe in without question.