Glossary · Updated
What is thumbnail?
Short answer
A thumbnail is the still image shown to represent a video before it plays. A good thumbnail is simple, readable at small size and honest about the content. On short-form platforms the cover frame plays a similar role, and you can often pick one from the video or upload an image.
How is thumbnail used in editing?
Use one clear subject, large text of a few words and strong contrast. A video's best frame often works as a cover.
What mistakes do people make?
- Too much text
- Misleading images
- Low contrast
How can a skill help?
A frame from a Bold or Glass render, with large words behind you, often makes a readable cover.
Frequently asked questions
Does a thumbnail matter?
On platforms with browsing, yes.
What size?
Sizes differ by platform and change over time, so check the platform's current guidance before designing the image.
Should it have text?
Use a few large words at most, with strong contrast, because thumbnails are viewed small and long text becomes unreadable.
Can I pick a frame?
Often yes. Many platforms let you choose a frame from the video as the cover, or upload your own image.
Skills mentioned on this page
Bold
A 10-second reel where giant words slam in behind you and captions pop word by word.
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