SmartPace

AI analyzes YouTube captions and automatically sets per-segment playback speed. SmartPace is a side panel extension that uses Anthropic Claude AI to analyze YouTube captions and automatically create a key-point summary and a per-segment playback-speed plan. Watch long videos faster, focused on what matters.

■ How it works 1. Open any YouTube video and click the SmartPace icon — the side panel opens. 2. Sign in with Google and click "Analyze" — no API key needed. (Free plan: 30/month, 5/day) 3. AI analyzes the captions and gives you two things:

• Key summary: the gist of the video in a few lines — copy it to your notes with one click
• Per-segment speed plan: the video split into 6~12 segments, classified by importance
• Key (1.1~1.3×) — first appearance of important concepts
• Normal (1.9~2.1×) — explanations, examples
• Filler (up to 2.0×) — intros, outros, repetition, ads, small talk

4. As playback crosses segment boundaries, the speed switches automatically.

■ Playback modes (beyond simple speed-up)

• All: play every segment at its own speed
• Skip filler: skip the less important parts — ads, intros, repetition, small talk
• Key only: play only the key segments and skip the rest
• Click any row in the segment list to jump straight to that segment