The intervention trial was designed to develop and evaluate a video-based HIV/STD prevention intervention for STD clinic clients. The primary goals of this study are to assess whether a brief video-based educational waiting room intervention can reduce STD incidence (STD incidence outcome study) and high risk behavior (behavioral outcome study) among male and female patients attending STD clinics, when compared with patients who receive standard clinic services. This study is being conducted as a multi-site trial in 3 urban STD clinics.