What problem does it solve? Watching long videos to answer specific questions is slow, and plain summaries lack verifiable evidence. This Skill turns one public YouTube or Bilibili video plus your questions into a traceable research report where every conclusion links back to timestamped transcript quotes and real extracted video frames. ## Core Features & Use Cases - Question-directed pyramid summary: Builds a chapter map of the whole video, then focuses the report body on your specific questions with a top-line answer and supporting points. - Timestamped evidence extraction: Acquires subtitles or runs local MLX Whisper transcription, extracts real frames with ffmpeg, and validates image integrity with SHA-256 hashes. - First-principles critique: Reconstructs the video's problem, assumptions, causal mechanism, and counterexamples separately from the speaker's claims. - Use Case: A researcher pastes a Bilibili lecture URL and asks "what is the author's core argument about scaling laws?" The Skill produces an offline HTML report with timestamped quotes, real screenshots, and a critical reconstruction, marked COMPLETE only after validation passes. ## Quick Start Use the video-insight-report skill to analyze this public video at the given YouTube or Bilibili URL around my questions and generate an evidence-linked offline HTML report.