Upload README.md

README.md

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+# Prepared Dataset Archives
+
+This repository stores a prepared split as tar.zst archives to avoid
+millions of small files in the Hugging Face repository.
+
+Extraction:
+
+```bash
+mkdir -p data
+for f in *.tar.zst; do
+  tar --use-compress-program=zstd -xf "$f" -C data
+done
+sha256sum -c SHA256SUMS
+```
+
+After extraction, the layout is:
+
+```text
+data/
+  dataset.json
+  dataset_stats.json
+  jsonl/
+  frames/
+  vision_cache/
+```