LONDON — Based on the success of cost-per-engagement metrics, Tremor Video has introduced other performance-based buying models for video ads, says Alex McNamara, UK Managing Director at Tremor Video, in an interview with Beet.TV. Tremor Video is rolling out a new suite of products letting advertisers pay by the cost per completed view, for instance. “An advertiser only pays then when someone watches the ad in its entirety,” he says.

That modeling helps ensure the ad is 100% viewable and provides an audited solution to the marketer, he says. Tremor provides reports to brands to verify the ads were viewed, he says. “You only pay for when it works,” he says.

Video advertising continues to grow at a rapid clip, and should grow globally by another 50% next year, he tells us in this video interview.