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YouTube thumbnail system
From the AgentCut prompt library: https://agentcut.dev/prompts/ds-thumbnail/
Written by AgentCut. Free to copy, edit and use in your own projects.
Sources and credit: YouTube Help, Add video thumbnails (https://support.google.com/youtube/answer/72431): Recommended size 1280x720, 16:9
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# THUMBNAILS.md: YouTube thumbnail system

## Canvas
- 1280x720 px, 16:9 (YouTube's recommended size). Export JPG or PNG.
- Design for the smallest place it shows: check it at 168x94 px. If you cannot read it there, it fails.
- Keep the bottom right 15% free of important content (the video length badge sits there).

## Layout (pick one per video, keep it for the series)
1. Face + 3 words: face on the right third, looking at the text or the viewer, text on the left two thirds.
2. Before / after: split down the middle, left "before", right "after", arrow or line between.
3. Object hero: one big object or screenshot, slightly rotated, text top left.
- One focal point. The eye should land in under a second.

## Text
- Max 4 words. Never repeat the title, add to it.
- Heavy condensed or grotesk typeface: [typeface], all caps or title case, one style for the series.
- Size: cap height at least 12% of the thumbnail height.
- White or [brand color] with a dark stroke or a solid block behind it.

## Color
- Background contrasts with YouTube's white and dark modes: avoid pure white and pure black backgrounds.
- One dominant color plus one accent [#HEX]. Faces stay natural.
- Push saturation and contrast slightly more than in the video, but skin must still look like skin.

## Faces and real images
- Real photos or real screenshots only. Clear emotion that matches the video (curious, surprised, focused). No fake expressions.
- Cut out the subject cleanly and add a 4 to 8 px light outline to separate it from the background.

## Series rules
- Same font, same text position and same accent color across the series so returning viewers recognize it.
- Keep a template file with locked layers for background, subject, text and logo.

## Never
- Misleading images or claims the video does not deliver.
- More than 2 colors in the text.
- Small logos or watermarks that compete with the subject.
