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[extractor/youtube] Construct fragment list lazily
Building fragment list for all formats take significant time for large videos
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@ -3777,11 +3777,11 @@ def _extract_formats_and_subtitles(self, streaming_data, video_id, player_url, l
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**dct,
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'format_id': f'{dct["format_id"]}-dashy' if all_formats else dct['format_id'],
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'protocol': 'http_dash_segments',
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'fragments': [{
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'fragments': LazyList({
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'url': update_url_query(dct['url'], {
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'range': f'{range_start}-{min(range_start + CHUNK_SIZE - 1, dct["filesize"])}'
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})
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} for range_start in range(0, dct['filesize'], CHUNK_SIZE)]
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} for range_start in range(0, dct['filesize'], CHUNK_SIZE))
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}
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if not all_formats:
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continue
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