Video Publisher Tests Call-to-Action Broadcast Button Simple button variation increases clicks by 12% Optimizely Ustream is a leading live interactive broadcast platform that aims to bring people together around shared interests for live interactive experiences. The company attracts millions of users from around the globe ranging from artists to celebrities to music enthusiasts to corporate executives. As a live and interactive video streaming site, Ustream is always looking for ways to improve their user experience. Part of their ongoing improvement process entails the development of new user interface design elements, each with specific goals in mind. When they launched an opt-in beta site for early adopters which had multiple proposed layouts. In order to determine the optimal layout fo

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