Mixpo, the Seattle-based company that creates custom, interactive elements for pre-roll ads for big brands and publishers, sees much bigger opportunities for interactivity in video ads that appear as banners, says Charlie Tillinghast, former President & CEO of MSNBC.com, who became CEO of Mixpo earlier this year.

While the inventory for pre-roll is limited, the availability for banner advertising is virtually unlimited, he points out.

In the interview, he talks about the acquisition last year of Portland-based ShopIgniter and how Mixpo is using the platform to integrate its custom video ad experience with Facebook.

We spoke with Tillinghast this week at the LUMA Partners adtech leadership conference in New York.

Tillinghast is a former chairman of the Online Publishers’ Association.