Thumbnails are usually the first thing people see when they find one of your videos. Make sure you’ve got a strong, vibrant thumbnail that looks great as a small image and conveys the most important information about your video. Thumbnails show up in different sizes and formats across YouTube and external sites with embedded YouTube videos.
General Guidelines
- When shooting a video, take shots that will make great thumbnails.
- Always upload custom thumbnails with the video file.
- Design thumbnails that reinforce your videos' titles and the actual content.
- Make sure the thumbnail adheres to YouTube's community guidelines.
Visual Guidelines
- Make sure thumbnails look great at both small and large sizes.
- Ensure they accurately represent the content.