In addition to fundamental video metrics like “Video played to”, you’d use Brand Lift to understand the extent to which your campaign shifts user perception or behavior.

• You’d use Viewability with Active View.
• You’d use Brand Lift.
• You’d use Reach Planner.
• You’d use Unique Reach and Frequency.

The correct answer is: You’d use Brand Lift.

Explanation: In addition to traditional video metrics like “Video played to,” you can use Brand Lift to measure the effectiveness of your video ads and understand the extent to which your campaign shifts user perception or behavior. Brand Lift focuses on metrics such as ad recall, brand awareness, and consideration. It’s available for in-stream and bumper ads bought via auction, but not for outstream and in-feed video ads. To use Brand Lift, you must create a Product or Brand that represents your advertised object, and Google will assist you in generating a set of survey questions to measure Brand Lift.

Read more here: https://support.google.com/google-ads/answer/9049825