I'm surprised anyone is willing to pay money for these video ads to be included when the process for them being 'viewed' includes the person putting their phone on silent and doing something else for the 30 seconds or so the ad plays
Are you sure? I think the average amount of attention such ads receive may actually be higher than your typical facebook or Google Content Network ad. The person is waiting for the ad to end to get on with what they wanted to do. Chances are pretty good they might be watching it.