A full-width vertical video that leverages placements within the page content. 

The ad unit is revealed as users scroll down the page, and appears inline with publisher content. When the the ad unit reaches the configured trigger point, it snaps into place, and playback begins.  During playback, if the user scrolls more than a defined percentage of the creative out of the viewport, playback pauses automatically. If the video is brought back into view, playback resumes.

DEMO LINK (Mobile browser required): View demo

PLATFORM: Mobile, Tablet 

FORMAT: Video (supported file types .mp4, .mov, 3gp)


  • 480p and above

  • Recommended length is 15-30 seconds

  • Suggest file size < 50MB

  • Aspect Ratio: Any. If your asset has a different aspect ratio than the placement, the stage will automatically crop your video.

  • The size of the video is defined by the viewport and presented in a roughly 9:16 aspect ratio.

  • For detailed info regarding sizing please visit Celtra's support site

ENVIRONMENT: Desktop & Mobile Web



  • Press/Tap to Call (direct connection from the phone to the advertisers call centre)

  • Press/Tap to download iOS application (link to page in App store)

  • Press/Tap to download pod cast or song from iTunes

  • Press/Tap to link to your mobile site


For clients building their own Universal interscroller creative, please refer to the following link (a Celtra login is required):