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Technical specification of ad formats

Video Rectangle (300x250)

Thanks to its location, the WideSquare is a very distinctive and popular advertising format that you can use on both desktop and mobile platforms. In this case, it is enriched with video.

Preview Template


Requirements for Video WideSquare

When using the standard appearance of the banner, it is sufficient to supply an image (JPG, PNG, GIF; with marked space for video) and a video file separately, the banner will be completed on our side.

In the case of extended animations, the use of dynamic elements, it is necessary to supply banner created in HTML according to this example.


  • Image (JPG, PNG, GIF)
  • HTML5
  • Video format: MP4; video codec: H.264


  • WideSquare: 300×250 px
  • Video: max. 300×250 px (usually 300×168 px)

Maximum data size

  • WideSquare: 100 kB (HTML5 max. 200 kB).
  • Video: max. 1 MB / max. bitrate 256 kB/s.

External display code

  • No

External measurements (beyond Mafra a.s. measurements)

  • Yes, according to our specifications.
  • Accepted third-party codes: AdForm, DCM, Sizmek, Gemius.
  • Attention! All third-party tracking codes must use only secure links (https://). In the creatives themselves, all tracking URLs must also use a secure connection (https://). Differences in tracking code statistics without using https:// will not be taken into account.

Want an animated banner?

In this case it is necessary to supply a banner in the format HTML5 .

Due to the smooth running and running of campaigns, documents delivered outside the described specification must be approved in advance by the MAFRA Technical Department. Thanks for your understanding.