Overview of video ad units

This feature is only available to networks with a dedicated Google account manager, and might not be enabled for your network. Contact your account manager for more information. If you do not have an account manager, your network is not eligible for this feature.

An ad unit in Ad Manager is space on a webpage dedicated to ads. it includes one or more ad slots, identified by sizes. There are two types of sizes: standard sizes and video sizes. Standard sizes represent regular display ad slots. Video sizes represent video players on a page that can show VAST (Video Ad Serving Template) ad responses.

Components of a video ad unit

A video ad unit is an ad unit that contains at least one video size.

  • One master video size (such as 400x300v). The master video size represents the video player size on the page. In Ad Manager, the letter "v" appears automatically at the end of any video size, indicating that it's a video size and that it's capable of playing back videos sent in the VAST format.
  • One or more companion ad sizes to run alongside the master video size.
  • Other non-video sizes, such as a banner at the top of the page.

This example illustrates a sample webpage with a video player that plays back the master video ad, a companion ad slot, and standard banner ad at the top of the page.


The ad unit representing this page might contain the following sizes:

  • 400x300v: master video ad slot
  • 300x250: companion ad slot (this slot may also display regular web ads not linked to the master ad)
  • 728x90: web ad slot, not linked to the master video ad
Was this helpful?
How can we improve it?