In-Stream Video 101: Introduction and How-to Guide

Have you seen video ads that display prior to a featured video online?

These are In-Stream Video Ads. At TrafficJunky, in-stream video ads yield some of the best results for our advertisers and have high conversion rates.

TJ ad network serves over 50 million daily in-stream video ads on premium sites such as Pornhub, YouPorn, Redtube, etc. These ads are compatible with all major video formats and are customizable with clickable CTAs (Call-to-Action).

In this blog, you will find useful information for your In-Stream Video campaigns, so that it gets you an easy start!




Pre-roll ads nowadays are very common on the Internet and familiar to different audiences. It’s also a very promising ad format for advertisers, and here is why: According to a Google Ads report in 2018, pre-roll ads are 3 times less likely to be interruptive than banner ads, which makes it much more effective. Trafficjunky pre-roll ads have a 5-10% average CTR on PC and are great for Branding, Retargeting, and Performance campaigns. With the pricing 1/10 of YouTube’s, it is without a doubt a very good investment to have. We typically see businesses in verticals such as Cams, Health & wellness, Casino, Poker, and mobile apps receive outstanding results in their pre-roll campaigns. Any questions? Reach out to, our team would be happy to assist you.


TrafficJunky provides pre-roll ads on:


  • Aspect Ratio: 16:9
  • Accepted Video formats: .MP4, .MOV, .WMN, .AVI, .VAST
  • Suggested maximum file size: 500MB
  • Max Video Length: 30secs
  • Recommended resolution: 1080p


  • Pre-roll ads automatically display on the first video view and every third view thereafter.
  • The skip button appears after 5 seconds.
  • Frequency cap: by default, pre-roll ads appear once every 24 hours.
  • Full clicks are offered on all devices.


o Supported VAST features:

  • Multiple tracking events: firstQuartile, midpoint, thirdQuartile, complete, mute, unmute, pause, resume, fullscreen, skip.
  • Pixel Tracking
  • Multiple Ads with different Ad weights
  • <Wrapper></Wrapper>, <AdVerifications></AdVerifications>, <Verifications></Verifications>, <CompanionAds></CompanionAds>, <Companion></Companion>, <Icons></Icons>, <Icon><Icon>

o  Unsupported VAST Tags: o  Unsupported VAST Features:

  • “sequence” attribute
  • “conditionalAd” attribute
  • Nonlinear Ads


What pre-roll stats do you provide? The dashboard on Campaign Manager provides reports on play, skip, and finish statistics.

Do you support ‘Calls to Action’ (CTA)? We support CTA text, ‘Visit Advertiser’ to be changed with custom text. Additionally, you can also add CTA banners and texts on your instream videos. 

Do you accept VAST / VPAID? TrafficJunky accepts any VAST up to VAST 4. We do not accept VPAID.

When should my video assets be delivered to TrafficJunky? We suggest that you submit your assets for creative review 24 hours in advance of when you want your campaign to go live.

Who to Contact

Comments, questions, or concerns? Reach out to, and our team would be happy to assist you.