The article discusses how the cast of Marvel movies has a history of unintentionally revealing spoilers for upcoming films. The article highlights a video that shows various instances where cast members have let slip major plot points or secrets during interviews and press events. The video lasts for 14 minutes and showcases a range of actors, including Tom Holland, Mark Ruffalo, and Chris Pratt, among others, discussing details that were meant to be kept under wraps. This pattern of spoiling surprises has become somewhat of a running joke among fans of the Marvel Cinematic Universe. Overall, the article emphasizes the challenges of maintaining secrecy in an industry where leaks and spoilers can quickly spread online, especially with such a high-profile franchise like Marvel.