What is video advertising for publishers?
The main video ad formats, the metrics that matter, and how publishers sell video inventory.
Written by Samhub with the help of AI·Updated 13 Oct 2026·3 min readDefinition
Video advertising is advertising in video form, shown before, during or after video content, or inside articles and feeds.
Video formats
| Format | Where it plays |
|---|---|
| Pre-roll | Before the video |
| Mid-roll | During the video |
| Outstream | Inside an article, without video content |
| In-feed | In a feed of content |
Metrics that matter
| Metric | Shows |
|---|---|
| Completion rate | Share who watched to the end |
| Viewability | Whether the video was on screen |
| Sound on | Whether audio played |
| CPCV | Cost per completed view |
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