What is a youtube thumbnail?

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Tags

1. #youtube
2. #thumbnails
3. #while
4. #covers
5. #click
6. #comes
7. #boring
8. #thumbnail
9. #whether
10. #image
11. #blurry
12. #often
13. #draws
14. #world
15. #online
16. #catching
17. #decision
18. #video