Karolina BendrykWaterfall models leak revenue due to their structure. Because this is a fundamental flaw, it cannot be fixed — only replaced by an alternative, more efficient model.
Video header bidding is such an alternative. It is built to handle the complexities of digital video ads.
It operates in two ways. You can use any of them or mix them if it is what your business needs.
Prebid is the gold standard. It’s the industry’s leading header-bidding engine, with a massive community driving improvements.
To truly maximize your margins, having your own SSP is a must. TeqBlaze’s white-label solution is the fastest route to launching your own platform.
While global video advertising spend is projected to increase by 58% over the next five years, this growth will not necessarily translate into higher revenue for publishers.
The main challenge comes from the waterfall monetization model. It is easy to set up, which is the main reason publishers still use it, but it's structurally prone to revenue loss. The waterfall processes buyers sequentially, often ignoring higher bids from partners lower in the chain before the auction even begins. Video Header Bidding is a strong alternative if used properly. In this article, we’ll explain how it works and how you can use it to get better results.
What is video header bidding?
Video header bidding enables publishers to sell their video ad slots to multiple demand sources simultaneously. The technology analyzes bids, selects the winner, and serves the ad. This shifts the focus from 'who is first in line' to 'who pays the most,' ensuring the highest bidder always wins — something a traditional waterfall simply can't do.
Header bidding video advertising is an evolution of classic display header bidding, specifically optimized for the nuances of video content, such as native advertising. However, its technical implementation is inherently more complex.
While display auctions run through scripts in the page header, header bidding for video requires additional synchronization with a video player or a specialized renderer compliant with VAST/VMAP standards. Furthermore, video ad auctions are far more sensitive to latency. While a few extra milliseconds might go unnoticed in display advertising, in header bidding for video, they can cause playback errors or player timeouts, leading to a complete loss of the impression.
Waterfall vs Video header bidding
Let’s take a closer look at the key differences between these two technologies:
Feature | Waterfall | Video Header Bidding |
Auction Model | Sequential (Daisy Chain). | Simultaneous. |
Bidder Capacity | Limited. The more participants, the longer the queue and the more time it takes to find a buyer (if the first in line refuses to buy). Usually capped at 5–10 partners. | Significant. Publishers can connect dozens of partners without significantly increasing ad latency. The main challenge here is the operational effort to manage so many bidders. |
Price Logic | Historical. Priority is given to partners who paid the most in the past, not in this specific auction. | Real-Time. Every bidder offers a price based on the value of the impression. |
Latency | Potentially high. Depends on the number of participants in the queue. | Low. Depends on the time needed for partners to answer your request |
Transparency | Low. | High. |
How header bidding video advertising works
To implement it, a publisher must first install a wrapper — a JavaScript code that serves as an auction controller.
Video header bidding wrappers function in two ways: client-side or server-side. You can use any of them or both simultaneously — it is up to you to decide.
How client-side header bidding works
Here is a simplified step-by-step description:
A user opens the website/app.
The wrapper triggers an auction by sending dozens of simultaneous requests to buyers and selects the winner.
The wrapper sends the VAST/VPAID tag to the player and triggers the ad playback.
How server-side header bidding works
The logic is similar, but there is a big difference:
A user opens the website/app.
Instead of multiple requests, the browser sends a single streamlined request to a dedicated server controlled by the developer of the wrapper you installed.
This server collects bids, selects the winner, and notifies the wrapper.
After receiving the winner information, your wrapper sends the VAST/VPAID tag to the player and triggers ad playback.
Client & server-side header bidding
Client-side vs server-side video header bidding: comparison table
Feature | Client-side | Server-side |
How it works | The user's browser sends ad requests to connected demand sources, handles the auction, and selects the winner. | The user’s browser sends a single, streamlined request to a server that handles the auction. |
Key Advantages | Higher eCPM: Direct access to the user's browser enables better transmission of high-value signals (such as first-party data), attracting premium bids. Transparency: Publishers can monitor all incoming bids in real-time. | Better auction control: Publishers manage key parameters, such as floor prices and timeouts, through centralized server-side configurations Better scaling: Publishers can connect unlimited SSPs, ad exchanges, and ad networks |
Limitations | Client-side can slow down the website’s performance/ad delivery, especially for users with slow internet or older devices. | Lower targeting precision: Server’s ability to identify users is limited compared to client-side header bidding. |
Best for | Publishers with valuable audiences for whom precise data (first-party or zero-party) is essential to attract premium bids. | Publishers prioritizing user experience and broad advertising goals (such as brand awareness), where high fill rates are the priority. |
Key benefits of video header bidding
So, what is video header bidding's main advantage? Yes, the ability to sell your inventory to all partners at once. This very ability is the main trump that opens several more undeniable benefits for publishers to consider. Specifically:
1. Maximizing eCPM through Real-Time Competition
Video ad header bidding creates genuine competitive pressure, forcing buyers to bid higher to maximize their chances of securing premium video slots and driving up your eCPM.
2. Sustaining high fill rates
While latency is an inherent flaw of the waterfall model, video ad header bidding effectively eliminates it as a barrier to revenue. Even though individual partners may still face technical issues, you no longer lose bids simply because a buyer was too far down the queue to respond before the player timed out.
3. Total transparency
You know exactly who won, who lost, and the specific price points offered. This transparency enables you to optimize floor prices based on lost-bid density, evaluate bidder efficiency to reduce latency, and leverage bid data to negotiate more lucrative direct deals with top-performing partners.
4. Seamless scalability
Adding new premium partners or ad networks doesn't require a complete overhaul of your server logic or a manual reordering of the chain. The wrapper makes integration flexible and fast, allowing you to scale your demand sources without technical headaches.
Prebid and Video Header Bidding: Any differences?
Video header bidding is the monetization method, whereas Prebid video header bidding is the suite of free, open-source tools that technically enable a publisher to run that auction. Beyond just the code, Prebid is a massive global community. It brings together developers who are evolving the Prebid video header bidding technology to address future challenges and publishers who use it to monetize their inventory.
TeqBlaze is an active member of this community, contributing directly to the growth of open standards. We have developed Prebid bidder adapters for our white-label SSP and Ad Exchange. For publishers, this means integrating our platform into their existing Prebid setup takes only minutes, ensuring stable data exchange and high-performance bidding from day one.
Video ad formats supported by header bidding
Format | Description | Where to place | Recommended KPI |
In-stream video ads (Pre/Mid/Post-roll) | Ads played within the video content itself. Pre-rolls run before the video, mid-rolls during breaks, and post-rolls after the main content ends. | Inside a video player on a website or app | VTR (Video Through Rate), Completion Rate, Viewability. |
Out-stream video ads | Standalone videos that appear inside text content as the user scrolls. They usually auto-close after playback. | Between paragraphs of an article, within news feeds, or in sidebars. | Viewability, CTR, Brand Awareness. |
Rewarded video | A value-exchange format where users get a reward (e.g., in-game currency, extra bonuses, or premium content) for watching a full ad. Offers the highest user loyalty. | Primarily mobile games and utility apps. | Completion Rate, Opt-in Rate, and User Retention. |
Interstitial Video | Full-screen ads that appear at natural transition points (such as when navigating between pages) to avoid interrupting the user’s engagement. | Mobile apps (e.g., between game levels or during tab switches). | CTR, Conversion Rate, ROI/ROAS. |
How TeqBlaze can help
Header Bidding is powerful, but it’s not a universal fix. In specific environments, like in-app monetization, waterfall models often remain the more effective choice than mobile video header bidding.
TeqBlaze’s white-label SSP bridges this gap, allowing publishers, ad networks, and monetization platforms to leverage the strengths of both auction models. How? By offering a variety of features that enable you to operate smoothly, including natively integrated Prebid adapters, SDK-rewarded video, customizable dashboards, and direct deals support. A key advantage of our solution is its omnichannel reach — Web, Mobile, OTT, CTV, and DOOH — enabling you to manage all your assets through a single, unified account.
Final thoughts
Video header bidding is a popular technology for programmatic video advertising. But true efficiency is reached when Header Bidding works with your own SSP infrastructure. With this, you gain the power to control the auction, streamline your supply chains to attract premium buyers, and — most importantly — keep the maximum margin within your own business.
Ready to see the difference? Book a demo of our white-label SSP and discover how our SSP platforms can put the power back in your hands. Still not sure? Check clients’ feedback and reviews about TeqBlaze to learn more about us.
FAQ
How do I know if my SSP supports web video/mobile video header bidding?
Check the technical documentation or ask your account manager whether their platform supports Prebid adapters or VAST-compliant header-bidding auctions.
Can video header bidding work with Google Ad Manager?
Yes.
How does video header bidding affect page load speed?
Client-side auctions typically increase latency as the wrapper sends multiple requests from the user's browser. Server-side fix this issue by moving the auctions control to the third-party server.
Is video header bidding suitable for mobile apps?
Yes.
What is the difference between VAST and VPAID in video header bidding?
VAST is the script that tells the video player which video to play, while VPAID is an interactive layer that enables clickable elements and advanced tracking.
