Integrating image capture in a JavaScript video chat app enhances user interaction and functionality by allowing users to take snapshots during video calls, capturing memorable moments or important information shared during the call. This feature can be beneficial in various scenarios such as education, business meetings, and remote collaboration. The tutorial guides developers through integrating image capture functionality in a JavaScript chat App with VideoSDK, covering essential steps like designing the user interface (UI), implementing join screen, initializing meeting, creating media elements, handling participant events, and capturing images of remote participants.