Is this true? I'm not sure if sponsors ask for this but I think metrics are available to creators to show how many people watch during different portions of the

Is this true? I'm not sure if sponsors ask for this but I think metrics are available to creators to show how many people watch during different portions of the video, so they could, including post-payment based on the results. See audienceWatchRatio under https://developers.google.com/youtube/analytics/metrics https://developers.google.com/youtube/analytics/metrics Example: "A one-minute video is watched 100 times. Half of the viewers stop watching after 15 seconds and the rest watch the entire video. None of the viewers watch any parts of the video more than once. In this case, this metric's value would be 1 for time buckets in the first quarter of the video, and its value would be 0.50 for the remainder of the video." So someone could ask for ratios before, after, and during the ad segment to see if it's worth sponsoring them again. On average they can tell how many people skip the segment, how many stop watching entirely, etc. You can also see this on the UI where it shows peaks above the timeline with other users clicking past sponsored content.