Mobilní Outstream (VAST)Kupi.cz

Before you produce

The advertisement must meet the general rules for creating the advertising formats. Before you send us your finished ad to deploy, please check the allowable max. data size and dimensions. Should you have any questions, do not hesitate and contact us.

Technical specifications




720p (e.g. 1280×720 px with 16:9 aspect ratio)

Maximum video length

30 seconds

Requirements concerning design

  1. Advertising can not contain foreign-language texts (only Czech allowed).
  2. Audio track of video clip must not be significantly quieter / louder than standard track soundtrack.
  3. Advertising can not contain interactive elements (only a click on the destination URL is enabled).


  1. The Outstream display is frequency-restricted twice per cookie for 24 hours.
  2. For external monitoring of impressions, it is necessary to separately provide a URL for 1×1 px monitoring image (this URL must not be a part of the VAST XML file). If the monitoring image is included in the VAST, it measures the start of video playback, not the impression.

External display code

Permitted as VAST XML URL only (not VPAID or OMID).

External monitoring of impressions

Permittedin compliance with the rules only one URL with 1×1 px monitoring image.

Additional information

You can verify that the video is working correctly in the Seznam.cz player using the External video checker.