How to Refresh Old Thumbnails with OpenClaw
Refresh old YouTube thumbnails with OpenClaw and ToolRouter. Rebuild thumbnails across a large video library in batch.
Tool
OpenClaw handles thumbnail refresh at the scale of a full channel audit — regenerating thumbnails for an entire back catalog or a large batch of underperforming videos in one organized pass.
Connect ToolRouter to OpenClaw
1Install the CLI
npm install -g toolrouter-mcp2Call tools directly from OpenClaw
toolrouter-mcp call web-search search --query "AI tools"
toolrouter-mcp toolsSteps
Once connected (see setup above), use the YouTube Thumbnails tool:
- Export the full video list with CTR data from YouTube Studio and define the new thumbnail style guide.
- Run generate_thumbnail for all videos below the CTR threshold with the improved style.
- Review a sample of new thumbnails before uploading the batch to confirm style consistency.
- Upload the full batch and track CTR changes weekly across the catalog.
Example Prompt
Try this with OpenClaw using the YouTube Thumbnails tool
Use youtube-thumbnails to regenerate thumbnails for all 50 videos in my channel with CTR below 3%. Updated style: consistent dark background, bright accent text, one clear central subject. Name each by video ID matching our YouTube export. Return the full batch.
Tips
- Export video IDs with CTR from YouTube Studio before starting so filenames can be matched on upload.
- Do not upload all 50 at once — stagger the updates across two weeks so the algorithm treats each as new activity independently.
- Set a CTR threshold for success before starting — 'did it improve' is not actionable, '3%+ within 2 weeks' is.