Outstream Video Ads

Outstream video ads play within your page content using the rmp-vast player, auto-float sticky to the bottom-right when scrolled out of view, and support 30-second skippable creatives.

Outstream video ads play within your page content — typically in an article, between paragraphs — without requiring a video player or any existing video on your site. They are one of the highest-CPM ad formats available to publishers.

How outstream works on Advlume

When you add a slot with data-advlume-format="outstream", the Advlume wrapper loads the video ad module (hb-video.js) automatically. The module:

1. Runs a Prebid video auction using the OpenRTB video parameters configured for outstream.
2. Creates a video player container in your slot div using the rmp-vast player (rmp-vast v17.2.0).
3. Renders the winning VAST creative inside the player.
4. If the visitor scrolls the player out of view while the video is playing, the player floats sticky to the bottom-right corner of the screen so the impression remains viewable. Once the video finishes or the visitor closes it, the sticky player dismisses itself.

Video creative specifications

Parameter	Value
Supported sizes	640×480, 640×360, 320×180, 300×250
MIME types	video/mp4, video/webm, video/ogg
Max duration	30 seconds
Skippable	Yes — skip button appears after 5 seconds
Playback method	Auto-play with sound off (method 2)
Linearity	Linear (in-stream compatible)
VPAID API	VPAID 2.0 (api: [2])
VAST protocols	1.0, 2.0, 3.0, 4.0, 4.1, 4.2 (protocols 1–6)

Adding an outstream slot

Add a div with the format set to outstream:

<div
  data-advlume-site="YOUR-SITE-UUID"
  data-advlume-slot="video-slot-name"
  data-advlume-format="outstream"
></div>

No other configuration is needed. The wrapper detects the format, loads the video module, and manages the player lifecycle.

Placement recommendations

• Place outstream slots within article content, between paragraphs. Mid-article placements achieve the highest viewability because visitors are actively reading.
• Give the slot container sufficient width — at least 300px. The player will render at the largest size that fits.
• Avoid placing outstream ads above the fold on mobile where they may autoplay before the user has engaged with content, as this can increase bounce rates.
• One outstream unit per page is the recommended maximum. Multiple autoplay units on the same page degrade user experience and may trigger demand partner quality filters.

Further reading

• Instream Video Ads — for sites that have a video player
• Adding Video Ad Tags — how to add video slots to your pages
• Best Practices for Ad Placement — positioning outstream ads for maximum viewability