Hour-long video temporal grounding is a search problem, shown by a new benchmark where all Video-LLMs collapse, frame retrieval outperforms them, 85% of failures are search-related, and a retrieve-then-ground hybrid improves results 6.7x.
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Natural-Language Temporal Grounding in Hour-Long Videos is a Search Problem: A Benchmark and Empirical Decomposition
Hour-long video temporal grounding is a search problem, shown by a new benchmark where all Video-LLMs collapse, frame retrieval outperforms them, 85% of failures are search-related, and a retrieve-then-ground hybrid improves results 6.7x.