Thumbnail violence and ad suitability

Creators often spend hours making the video clean and then lose ad earnings because of a thumbnail. The thumbnail is judged separately from the video, and YouTube's guidelines name it explicitly. Here is how it works and how to build a thumbnail that is exciting without being a risk.

What the guidelines say

In the advertiser-friendly content guidelines, graphic game violence in the thumbnail appears under the limited ads tier, and it is also listed in the no ad earnings tier alongside the first seven seconds. On the gaming content page the thumbnail is likewise grouped with the early seconds of the video. The pages are not consistent about which tier applies, so treat a graphic thumbnail as a risk of limited or no ads on an otherwise mild video. The guidelines also cover other thumbnail issues, such as strong profanity in a thumbnail or title.

"Graphic" is defined as brutal killings or severe injuries that focus on bodily fluids or body parts, for example beheadings or dismemberment. A thumbnail of two characters facing off or a vehicle in the air is not the same as one showing a wound.

Why the thumbnail is easy to get wrong

Creators pick the most dramatic frame, and the most dramatic frame is often the most graphic one.
Auto-generated thumbnails come from frames YouTube picks. Upload a custom one, so you control it.
Red-heavy artwork (blood effects, filters) can look worse at small size than it does at full size.

Choosing a thumbnail frame

Prefer the build-up to the result. The moment before an explosion or a hit, with the reaction on a face, usually works better than the aftermath.
Show a character or a scene, not an injury. Faces, vehicles, locations and weapons held but not used tend to be lower risk.
Use a headline, arrow or highlight. Text and shapes can carry the thumbnail without gore.
Look at it at small size. If the first thing you see is a wound, change it.

If the frame you want is graphic

Crop it so the injury is outside the frame, blur or pixelate the area, or paint over it with a shape or a sticker. The same techniques as in how to blur gore apply to a still image, and for a still they are even easier.

Can I change a thumbnail later?

Yes. You can replace a custom thumbnail in YouTube Studio after upload. Ad suitability may be re-evaluated, but it can take time and YouTube does not give a specific timeline we can cite. When in doubt, set the lower-risk image before you publish.

The title counts too

A title that sells the video on gore, or contains strong profanity, adds to the risk. The guidelines list strong profanity in a title or thumbnail as a no ads trigger, and moderate profanity there as limited. Keep titles descriptive.

What you can check automatically

Clip Preflight scores sample frames from the first 15 seconds of your clip, which is often where you would grab a thumbnail from. If a frame is flagged, avoid using it. It does not yet check an uploaded thumbnail image, so look at your final thumbnail yourself. The check is an estimate of risk and can be wrong in both directions.

Run the free check on your clip

Runs in your browser. Footage never leaves your computer. Pro (one-click fixes) is coming soon.