Common reasons thumbnails are missing
If ThumbGrab says "No thumbnail found" or shows fewer options, it's usually because:
- No custom thumbnail was uploaded
- The video is private or restricted
- The video is extremely new
- YouTube never generated higher resolutions
ThumbGrab simply exposes what YouTube provides.
What you can try
- Wait a few minutes for new uploads
- Try another resolution
- Verify the video is public
If nothing appears, there's nothing to extract.