Media Types

Inventory > Ad units > General: Media Types

Last edited: 2025/01/20

Media Types: Ad unit configuration where you specify the sizes of Prebid Media Types (e.g., Banner, Video) that can be served on the ad unit. If needed, you also define parameters for Native and Instream / Outstream Video ad units.

Defining media types

1. Go to:
1. In Old Platform: Prebid Stack > Inventory > Ad units > select the ad unit that you want to edit > Media Types
2. In New Platform: Inventory > Ad units > select the ad unit that you want to edit > General: Media Types
2. Select:
1. No size mapping / Ignore viewport width (default) if you want to set the same Media Types and Sizes for all users and pageviews or
2. Custom / Define per viewport width (recommended) if you want to differentiate them based on user’s viewport:

Good practice: We recommend first defining Viewports (Devices) and the list of sizes you want to apply based on the detected user’s viewport width. When you select the option to define sizes per viewport width, the Media Types will already be populated with the list of sizes you defined per Viewport. This allows you to easily exclude unwanted sizes or add additional ones if necessary.
3. Select the Media Types you want to apply to the given Ad Unit. You can use Banner, Outstream Video, and Native simultaneously. However, if you select Instream Video, no other Media Type can be added to the same Ad Unit.
4. Define the sizes you want to use. These sizes will be requested from Prebid and Amazon UAM/TAM (if applicable). Note that Player size applies to both Outstream and Instream Video.


Related documentation:

AB Fixed Size Ad Specifications: https://www.iab.com/wp-content/uploads/2019/04/IABNewAdPortfolio_LW_FixedSizeSpec.pdf

5. If you want to use Outstream, Instream, or Native Media Types, add the JSON configuration object:
1. Video (Instream / Outstream):

Exemplary Outstream video configuration code:

Copy

{
  "api": [2],
  "mimes": [
    "video/mp4",
    "video/x-flv",
    "video/x-ms-wmv"
  ],
  "linearity": 1,
  "protocols": [1, 2, 3, 4, 5, 6],
  "maxduration": 10,
  "playbackmethod": [2]
}



Full list of available parameters: Prebid Documentation.

2. Native

Exemplary, properly formatted native configuration code is below (please pay attention to proper formatting of the brackets):

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{
    "body": {"required": false},
    "icon": {"required": false},
    "image": {
        "sizes": [[300, 200]],
        "required":true
    },
    "title": {"required": true},
    "sponsoredBy": {"required": false}
}



Full list of available parameters: Prebid Documentation.



Attention: Makes sure that you use the proper JSON formatting. Learn more.
6. If you want to use Instream video Media Type, you must define a Video Player provider:
1. Go to Global setup > Prebid > Defaults: Prebid Video
2. Select the video player from the list
3. Click ‘Save’


If your Video player is not supported yet (isn’t on the list), please contact Yieldbird directly for support.

Important: Using Prebid Stack on Instream Video or Native Media Type Ad Units requires dedicated Line Items in GAM. Make sure to create them before proceeding. Learn more.

On this page:

• Media Types
• Defining media types