Content Length Matters Most for Video Ad Completions

Online video viewers often cite fewer ads as one reason they watch content online rather than on traditional television, yet many publishers want to increase video ad loads and advertisers want to make sure their placements are being viewed. Research exploring how to satisfy all three constituencies indicates that while the length of online video ads matters for completion rates, the length of the content surrounding it is also key for this metric.

A study by content delivery network Limelight Networks of video ads served during the first half of 2010 found that 15-second ads were more than 20 percentage points more likely to be viewed to completion than 30-second ads.

Online Video Ad* Completion Rate Worldwide, by Length of Video, Q1-Q2 2010 (% of video ads served)

But examining how ads of different lengths are viewed with content of different lengths gives a fuller picture of video ad tolerance. Ad management technology provider FreeWheel found that 15-second and 30-second ads were completed at almost identical—and very high—rates when supported by long-form content. Mid-length content also saw increased completion rates compared to short-form content, for both longer and shorter ads.

Completion Rates for Online Video Ads Served to US-Based Audiences, by Video Ad Length, Q1 2010-Q1 2011

Ad placement also had a significant effect. Mid-roll ads, which typically cannot be skipped and appear when viewers are already invested in watching content, were viewed to completion more than 90% of the time between Q1 2010 and Q1 2011. Completion rates for pre-roll and post-roll ads were lower, and appeared to gradually fall during the study’s timeframe.

Completion Rates for Online Video Ads Served to US-Based Audiences, by Video Ad Type, Q1 2010-Q1 2011

FreeWheel reported that many publishes are already aligning content with ad lengths that make sense and produce the most views. Longer ads were five times more likely to be placed with long-form content, while most 15-second ads appeared with short-form content. And the high performance of mid-roll ads has helped boost volume for the format by 30% between Q4 2010 and Q1 2011, as more long-form content comes online to support them.

Via emarketer

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