title: How can I make unskippable ads?(AdMob)
body: <p>I'm working with AdMob rewarded ads, in the AdMob test rewarded ad the video length is 5 seconds, and after 5s a skip button appears, and I do have several questions:
  Does all ad videos length will be 5 seconds?
  Can I make unskippable ads?
  Can I set the ad video skip time? (first one 15s, the other 30s...)</p>