The document discusses the importance of A/B testing videos on websites. It provides examples from Wistia's experience testing different video placements and content on pages like their About Us page, product page, and onboarding flow. Their tests showed an 8% increase in activations from adding a tutorial video to their Welcome page, a 9% increase in signups from removing a video from their product page, and a 30% increase in usage from adding a tutorial video to their onboarding flow. The key lessons are to set goals for video tests, test in actionable places like high traffic pages, and learn from the data on what video content and placements are most effective.