This is not a question about blocking ads in apps - they're annoying but if I choose a free ad-supported app, it's right I should see ads.
But, some ads feature video - for instance one app I am forced to watch a 30s trailer to Finding Dory about 20 times a day. My main issue here is data usage; I'm worried it will eat my mobile data and even by broadband limits if I am using a MiFi device when travelling.
Can I have any control over what ads are played through Google Play apps? e.g. disable video-based ads?