Marketing

From banners to billions: The rise of video ads

1.4.2025

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Key takeaways

Video advertising has evolved from a niche tactic into a cornerstone of digital marketing. What began in the early 2000s quickly gained momentum, especially after YouTube’s 2006 acquisition by Google. Today, video ads drive measurable results across platforms, from desktop to mobile and CTV, delivering 80%+ view completion rates and 50+ seconds of average engagement per user, according to Mars Media Group's video advertising division.

With over 20 billion monthly premium video ad auctions, 600+ direct publisher relationships, and a proprietary audience engine, video advertising isn’t just effective—it’s essential. Marketers are no longer treating video as a subset of TV spend. Instead, they’re shifting budgets away from static formats and into dynamic, high-performing video placements that engage audiences where it matters most.

Maximizing your online video ads: Exploring the different ad formats available

Display ads (banners):

These appear across all areas of the site, except the homepage. The most common format is a 300×250 ad, typically shown to the right of the feature video and above the video suggestions list.


Overlay in-video ads:

​Overlay in-video ads are semi-transparent advertisements that typically appear at the bottom of a video, allowing viewers to see both the content and the ad simultaneously. While YouTube discontinued this ad format in April 2023 to enhance user experience and adapt to mobile-friendly alternatives, overlay ads continue to be utilized across various other platforms.


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Current usage of overlay ads in other ecosystems:

Connected TV (CTV) environments:

Overlay ads are increasingly being integrated into CTV platforms. For instance, Roku has explored various advertising methods, including overlays, to enhance viewer engagement and monetization. ​

Augmented Reality (AR) applications:

In sports broadcasting and live events, overlay ads are used to insert virtual advertisements onto the playing field or within the venue, providing targeted advertising without physical installations. ​

TrueView ads

In-stream ads (pre-roll):


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These appear before the content a user wishes to view. They may be skipped after five seconds. You only pay for this ad format if a user watches the whole video, or 30 seconds of the ad, whichever comes first.


In-display ads:


This offers your ad as an opt-in format, showing your ad thumbnail and some ad text either as an overlay on other videos, on the YouTube sidebar, or as an ad on Display Network partner sites other than YouTube. With this format you pay only if a user chooses to click your ad.


In-search ads:


These appear as a result of a search performed on YouTube. The payment is only made if an ad is clicked by the user.


Non-skippable in-stream ads (Pre-roll):

Video ads that can be inserted before or during the main video and must be watched before the viewer can continue watching the content selected. These ads can also be placed after the conclusion of a video, in the post-roll slot.

Video ads dominate digital budgets

Digital video advertising has experienced remarkable growth over the past decade, solidifying its position as a cornerstone of digital marketing strategies. In 2024, digital video ad spending worldwide surpassed $191.3 billion, with the United States leading at approximately $108.15 billion—nearly four times that of China, the next largest market. ​

This surge is driven by the increasing consumption of video content across various platforms, including mobile devices, desktops, and connected TVs (CTV). In the U.S., social video ad spending reached $23.4 billion in 2024, while CTV ad spend exceeded $20 billion for the first time in 2023 and is projected to grow 12% in 2024 to nearly $23 billion. ​

The effectiveness of video advertising is further enhanced through personalization. Studies have shown that personalized video ads can significantly boost engagement and conversion rates. For instance, a marketing experiment demonstrated a 300% increase in click-through conversions when using personalized videos compared to generic ones. Additionally, 71% of consumers prefer personalized ads, indicating a strong receptivity to tailored content. ​

In summary, the rapid ascent of digital video advertising underscores its effectiveness and growing importance in engaging online audiences. As consumption patterns evolve, particularly with the rise of mobile and connected TV platforms, video advertising remains a dynamic and essential tool for brands aiming to establish a robust online presence.

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