depression

Stanford professor Robert Sapolsky lectures on depression as a real biological disease. He covers its biological and psychological causes, how it differs from ordinary sadness, and ideas such as learned helplessness. He ties these together into one account.

Jon Kabat-Zinn leads an hour-long Google tech talk on mindfulness, introducing the basic ideas and including a guided meditation. It is aimed at newcomers.

The classic 1980s anti-drug PSA in which a father confronts his son about drugs and is told 'I learned it by watching you'.