If I were to goal a video streaming app like Netflix or YouTube for Facebook, I would focus on creating a personalized and social experience for users. One way to achieve this would be to use Facebook's vast amount of user data to curate content recommendations based on each user's interests and viewing history. Additionally, I would explore ways to integrate social features into the app, such as the ability to share and discuss content with friends or to see what your friends are currently watching. In terms of execution, I would prioritize developing a seamless and intuitive user interface that makes it easy for users to discover and access content. This would involve conducting extensive user research and testing to ensure that the app is designed with the needs and preferences of our target audience in mind. I would also focus on creating a robust content library that includes a mix of popular and niche content to appeal to a broad range of users. To ensure the ongoing success of the app, I would track and analyze key metrics such as user engagement, retention, and satisfaction. This would enable me to continuously iterate and improve the product to better meet the needs of our users and achieve our business objectives. Overall, my goal for the video streaming app would be to create a compelling and differentiated experience that leverages Facebook's unique strengths and drives sustained user engagement and growth.