Jason Russell, "Kony 2012" Filmmaker, Hospitalized SAN DIEGO - A co-founder of Invisible Children, the nonprofit organization whose video "Kony 2012" has become an Internet sensation, was detained by the San Diego police on Thursday, after they said he was found in the street in his underwear, screaming and interfering with traffic. The police found Jason Russell, the filmmaker behind the video, after responding to calls about a man who was acting irrationally, including one call that alleged he was naked and masturbating, a San Diego police spokeswoman said. He was taken to a hospital for evaluation and treatment, and the police have no plans to charge him. "It's our belief that a medical condition would explain his irrational behavior as opposed to criminal intent," said Lt. Andra Brown, the spokeswoman. If we thought he was under the influence, we wouldn't have taken him to a hospital; we would have taken him to jail. The 30-minute "Kony 2012" video has been viewed nearly 80 million times on YouTube since March 5. It has thrust a sudden celebrity upon Mr. Russell, 33, who narrates the video and appears in it with his young son, appealing to viewers to bring more attention to the Ugandan warlord Joseph Kony and advocating his arrest. That success has brought criticism of Invisible Children for the way it spends its money, for a photograph of its founders, including Mr. Russell, holding rifles, and for other matters. In a statement released on Friday, Ben Keesey, chief executive of Invisible Children, said, "The past two weeks have taken a severe emotional toll on all of us, Jason especially, and that toll manifested itself in an unfortunate incident yesterday." Mr. Russell was suffering from "exhaustion, dehydration and malnutrition," Mr. Keesey said. He said Mr. Russell "is now receiving medical care and is focused on getting better."