Text-Only Training for Zero-Shot Video Temporal Localization
This paper explores training a text-only LLM on synthetic textual video descriptions to perform temporal grounding, receiving video only at inference. The authors generate a 134K-example corpus, adapt Qwen3-8B with LoRA on text embeddings, and propose Nearest Entity Replacement (NER) to bridge the modality gap. NER improves zero-shot performance on Charades-STA and QV-Highlights, but a significant gap remains.