A content creator wants to know the added value of their Video view campaigns. Which metric shows follow on likes and subscribers driven by the campaign?

The metric is earned actions. Earned actions count what viewers do voluntarily after seeing a paid ad but outside the ad itself — subscribing to the channel, liking or sharing the video, adding it to a playlist, or watching further videos from the channel. They are free in the sense that the advertiser is not charged for them, which is why they represent genuine added value on top of the views bought. For a creator or a brand building an audience on YouTube, this is often where the real return sits: a campaign might buy 200,000 views and pick up several thousand subscribers who will see future uploads organically for years. Reporting earned actions alongside cost per view gives a much fairer picture of what the campaign delivered than views alone.