YouTube Clip Marker

About

YouTube Clip Marker turns your browser into a clip-logging tool for YouTube. Mark precise in and out points while you watch, name each clip, fine-tune boundaries, and export everything as ready-to-run download scripts or structured JSON. It is built for anyone who rewatches footage to pull selects: editors, researchers, archivists, clip channel creators, or anyone tired of scribbling timestamps into a notepad.

  Key features:

  - Set precise in/out points on any YouTube video while it plays
  - One-click Quick Clip with configurable duration and a pre-buffer that rewinds a couple of seconds to catch the moment you
  just reacted to
  - See all marked clips as colored regions on YouTube's seek bar
  - Rename clips inline, nudge start/end times with +/- buttons or mouse scroll, and click any timecode to seek the video there
   instantly
  - Clips auto-save per video and reload automatically when you revisit the page
  - Export as .json (full metadata), .sh (Linux/Mac), or .bat (Windows). Each script downloads the full video once with yt-dlp, then extracts every clip with ffmpeg in a single pass
  - Keyboard-driven workflow: [ mark in, ] mark out, \ quick clip, Alt+I/O/M global shortcuts

  How it works:

  1. Go to any YouTube video. The scissors icon appears in the player controls
  2. Press [ to set an in-point, ] to set an out-point (or \ for a quick clip)
  3. Name and adjust your clips in the sidebar panel on the right
  4. Export and run the script locally with yt-dlp + ffmpeg to extract your clips

  Designed for:

  - Video editors pulling selects or building rough cuts
  - Clip channel creators marking highlights
  - Researchers and archivists logging segments of long-form content
  - Students bookmarking lecture sections for review
  - Anyone who needs timestamped notes that actually do something

  Export details:

  - JSON: structured metadata with video info, clip names, timecodes, and durations
  - Shell script (.sh): downloads the video once, then runs ffmpeg per clip. Frame-accurate cuts
  - Batch script (.bat): same workflow for Windows

  Important notes:

  - All data is stored locally in your browser. No accounts, no servers, no tracking
  - Export scripts require yt-dlp and ffmpeg installed on your machine
  - Works on standard YouTube watch pages (not YouTube Music, Shorts, or embedded players)