If you can tell me the or the general topic of the video (e.g., tech review, educational lecture, software tutorial), I can likely tell you exactly what happens in those 7 minutes.
In many technical tutorials, this 7-minute block represents a deep dive into functionality, such as a "How to," a "Pro/Con analysis," or a "Live Demo" of the topic discussed before 21:59.
Without direct access to that specific video's content, the most common "feature" in that timeframe is a detailed, focused demonstration of the main topic.