"I was kind of a loser," admits Wentz in the popular video, which after first appearing on YouTube Monday has since garnered nearly 200,000 views and ranked the 40th most watched English clip this week.

"A few months ago, I saw a film called Invisible Children," Wentz says over home video footage of his own rise to rock stardom following images of war-torn Africa. "The government of Uganda has pushed thousands of families from their homes. This has created the most neglected humanitarian crisis in the world today."

Wentz is backing a particular event on April 28, Displace Me, which is encouraging Americans to travel to one of 15 "displacement" camps around the country, in order to make "a visible statement to our government and media that the citizens of the U.S. demand action in ending the war in Northern Uganda," according to the Displace Me website, which also includes a video diary from filmmakers who traveled among the 1.5 million displaced Ugandans.

For his part, Wentz, recently written about in The New Yorker magazine, also seems intent on displacing Internet-wide nude pictures of himself and celebrity gossip with something more constructive. As he says in the YouTube video, "Most of you may know me as some dude in a band, but if there is something I can do to save a life, I will."