ResearchResearch paperMultimodal Models · Image, Video & 3D Generation · Large Language Models1 source · Oct 18, 2026

GroundedVDR: Grounding Video-to-Web Evidence Dependencies in Video Deep Research

Video large multimodal models have improved at identifying cross-frame visual evidence and conducting open-web retrieval, as reflected in recent video deep research (VDR) benchmarks.

Key points

  • However, existing VDR benchmarks primarily evaluate tool-use trajectories and final responses without verifying whether a model actually uses the temporal video information or the retrieved web evidence.
  • To fill this gap, we introduce \method{}, an evidence-grounded benchmark with three features.
  • Second, each question carries structured video-to-web evidence annotations that link the relevant video segments to their supporting web evidence.
  • Across eight multimodal agent systems, the best reaches 76.0% answer accuracy, yet none recovers the complete required web evidence for more than 8% of questions.

Sources (1)

  • [1]GroundedVDR: Grounding Video-to-Web Evidence Dependencies in Video Deep Research
    arXiv (AI, ML, NLP, CV, robotics, multi-agent) · Oct 18, 07:26 PM
    Video large multimodal models have improved at identifying cross-frame visual evidence and conducting open-web retrieval, as reflected in recent video deep research (VDR) benchmarks.
    However, existing VDR benchmarks primarily evaluate tool-use trajectories and final responses without verifying whether a model actually uses the temporal video information or the retrieved web evidence.

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