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README.md

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 ---
 license: cc-by-nc-sa-4.0
+language:
+- en
+- ja
+pretty_name: MEDit-Bench
+tags:
+- video
+- video-summarization
+- temporal-grounding
+- video-captioning
+task_categories:
+- video-text-to-text
+size_categories:
+- 1K<n<10K
 ---
+
+# MEDit-Bench: Temporal Grounding Annotations
+
+Human-annotated temporal grounding data for 60 YouTube videos. For each video,
+annotators were given a short list of "summary messages" describing the video
+and asked to mark every time range in the video that supports each message.
+Each message was annotated independently by 3 annotators.
+
+This dataset ships **annotations only** — no video files. Each row points to
+the source video via its YouTube ID / URL so the underlying footage can be
+retrieved directly from YouTube.
+
+## Dataset structure
+
+One row = one summary message for one video.
+
+| column | type | description |
+|---|---|---|
+| `video_id` | string | YouTube video ID |
+| `message` | string | Summary message text (English) |
+| `segments` | list of list of `[start, end]` | The cuts annotators marked as supporting this message. Outer list = one entry per annotator (3 annotators per message); inner list = that annotator's `[start, end]` timecode pairs (`HH:MM:SS:FF`, frame number — not converted to seconds since source frame rate varies). |
+
+- 60 videos, 180 messages (3 per video).
+
+## License
+
+Annotations are released under CC BY-NC-SA 4.0. Source videos remain the
+property of their original YouTube creators and are not redistributed here.