YouTube Shorts are unique because they have two faces. Depending on where the viewer finds your video, they see a different image.
| Traffic Source | Thumbnail Format | Strategy |
|---|---|---|
| Shorts Shelf (Feed) | Dynamic Preview. The video auto-plays. No static image. | Must have a visual "Hook" in the first 1-2 seconds. |
| Channel Page | 9:16 Vertical. Only the vertical slice is shown. | Use the mobile app's "Pencil Icon" to select the perfect frame. |
| Search / Recommendations | 16:9 Horizontal. The same as a normal video. | You can upload a custom 16:9 thumbnail via YouTube Studio (Desktop) to capture this traffic! |