SAN DIEGO: The wife of the film director who made a wildly popular video about brutal African warlord Joseph Kony says her husband has been diagnosed with brief reactive psychosis and is expected to stay in the hospital for weeks.

Jason Russell was hospitalized last week in California after witnesses saw him running through streets in his underwear, screaming and banging his fists on the pavement.

Danica Russell said Wednesday that her husband's condition was brought on by extreme exhaustion, stress and dehydration. She says it may be months before he returns to his job at Invisible Children, the charity he co-founded in 2005.

The 30-minute video has been viewed more than 84 million times on YouTube since it was released this month.