If John is setting up a new video campaign, which manual bidding strategy should he use?
The correct answer is:
Cost-per-view (CPV) bidding is the default way to set the amount that you’ll pay for your TrueView video ads (when created with AdWords). With CPV bidding, you’ll pay for video views and other video interactions (such as clicks on the call-to-action overlays, cards and companion banners), whichever comes first.
Read more here: https://support.google.com/adwords/answer/2472735