YouTube in-feed video ad specs
YouTube in-feed ads appear as a thumbnail with text in places like search results and the home feed; the video plays when someone clicks. Google lists no maximum length. The ad is built from a thumbnail image and text whose size varies by placement, and the video meets standard YouTube requirements: 1080p recommended.
Updated
The spec sheet
| Spec | Requirement |
|---|---|
| Length | No maximum |
| Ad unit | Thumbnail image plus text; size varies by placement |
| Video resolution | 1080p recommended; 720p minimum HD |
| Aspect ratios | 16:9, 9:16, 1:1; also 4:3, 2:3, 4:5 |
The thumbnail is the ad
In-feed ads compete with organic results on the same page, and nobody sees the video until they choose to click. That makes the thumbnail and the title the creative that does the selling; the video's job is to deliver on what they promised.
Good in-feed thumbnails look like the organic videos around them: a clear subject, high contrast, very little text. A thumbnail that looks like a banner ad is easy to ignore.
Longer content belongs here
Because viewers opt in, in-feed is the YouTube format where a longer demo, tutorial or review makes sense. Someone who clicked a thumbnail for 'how to set up X' is prepared to watch for minutes, not seconds.
Questions
- How long can a YouTube in-feed ad be?
- Google lists no maximum length for in-feed video ads.
Sources
Read on 13 October 2026. Platforms change specs and policies without notice; check the source before you build to a number.