YT Data API is a product that provides an application programming interface (API) allowing users to search for videos, retrieve video details, and access comments on the YouTube platform externally. This product is designed to enable developers and third parties to integrate YouTube features related to videos, including search, details, and comments, into their own applications or services.

By using the YT Data API, users can send API requests to search for videos based on specific criteria such as keywords, categories, or other filters. The search results will include a list of videos that match the specified criteria, including information such as the video title, description, author, upload date, and view statistics.

Additionally, users can leverage the YT Data API to retrieve comprehensive details about a specific video. By providing a valid video ID, users can request the API to return detailed information about that video, including the title, description, duration, thumbnail, tags, and other related data.

The YT Data API also allows users to access and manage comments related to a video. Users can use the API to retrieve comments associated with a video, post new comments, reply to comments, or perform other actions related to comments.

The YT Data API product provides flexibility for users to integrate and manage video data, video details, and comments from YouTube into their own applications or services, without relying on the official YouTube interface.