YouTube gives creators two options for video thumbnails. Understanding the difference helps you identify which type you are downloading and why custom thumbnails matter for your research.
| Feature | Custom Thumbnail | Auto-Generated |
|---|---|---|
| Source | Designed and uploaded by creator | Randomly selected video frames |
| Quality | Professional, edited, branded | Unedited screenshots from video |
| Click-Through Rate | 2-3x higher on average | Baseline performance |
| Text Overlays | Common (titles, hooks, CTAs) | No text (raw video frame) |
| Resolution | Usually 1280×720 | Variable quality |
| Branding | Often includes logos or brand colors | No consistent branding |