To determine the success of the Instagram Video launch, there are several metrics that can be tracked. First, we can look at user engagement with the feature, including the number of videos posted, views, likes, and comments. We can also track how frequently users are using the feature and whether they are using it in conjunction with other features on the platform. Another key metric to track is user retention. Are users continuing to use the app after the initial launch period? Are they using the video feature consistently over time? In addition to user engagement and retention, we can also track business metrics such as revenue and user acquisition. Are we seeing an increase in ad revenue as a result of the video feature? Are we attracting new users to the platform as a result of the launch? Finally, we can also conduct user research to gather feedback on the feature. This can include surveys, focus groups, and interviews with users to understand their perceptions of the feature and how it fits into their overall use of the platform. By tracking these metrics and gathering user feedback, we can determine the success of the Instagram Video launch and make informed decisions about how to optimize the feature going forward.