AdWords

•Impressions: Number of times the ad was shown. If you're getting very few impressions, it may be because you have targeted videos that are no longer being viewed, or that your bids are not competitive enough.

•Clicks: Number of times the ad was clicked.

•Click Through Rate (CTR): Number of times the ad was clicked divided by the number of times the ad was shown.

•Average CPC: Average cost for every click.

•Average CPM: Average cost for every 1,000 impressions

•Play rate: Number of times a Click-to-play video ad was played divided by the total number of impressions.

•Average position: Position of your ad in the search results. This is only available for Promoted Videos. All other ad formats will show as "1".


•Conversions: Number of users who clicked on the ad and later converted. In order for this metric to be available to you, you must have AdWords Conversion Tracking installed.


•View-through conversions: Number of users who were exposed to the ad and later converted. Again, in order for this metric to be available, you must have AdWords Conversion Tracking installed.
DART:
•Impressions booked / Ads impressions: Make sure you delivered all the impressions you were expecting to book.

•On Schedule Indicator (OSI): The percent likelihood the campaign will deliver all impressions booked.

•Clicks: Number of time the ad was clicked.

•Click Through Rate (CTR): number of time the ad was clicked / number of time the ad was shown
25% viewed, etc: Number of users who watched 25% of the way through a video ad.
Measuring User Engagement with YouTube Videos
YouTube Insight is an incredibly powerful analytics tool accessible, for free, to anyone who uploads a video to YouTube. This tool is available to advertisers, Display Network partners, and users.
To access the tool just click on "Account" within your YouTube account and then "Insight".
Learn more about YouTube Insights.
YouTube Insight is particularly useful if an advertiser has a large number of videos uploaded to YouTube or is running an Promoted Videos campaign.
YouTube Insight lets you see data for either an individual video or aggregated data for all the videos uploaded by a particular user, advertiser, or Display Network partner. Most data can be analyzed over a specific time period, and for individual countries.
Specific data available are:
•Views (How many people watched your video):
◦Daily views

◦Unique users

◦Relative popularity in certain countries

•Discovery (How people found your video):
◦Advertising: What percentage are coming from your Promoted Videos campaign?

◦Did users watch your video on the watch page or on a channel?

◦Embedded player: Was the video embedded off YouTube on another site or blog?

◦Google / YouTube search: What search terms were users using to find your video?

◦Mobile views: Were people watching the video on their mobile devices?

◦Related videos: What other videos are users coming from?

◦Subscriptions: How important is it to get people to subscribe to your channel?

•Demographics:
◦Age

◦Gender

•Community (User engagement with videos beyond simply watching it):
◦Aggregate community engagements

◦Ratings

◦Comments

◦Favorites

•Hot Spots (See how much the community liked portions of your video):
◦Above the line: Indicates that users liked this portion of the video more than the rest of the video on average (i.e. they didn't exit the video at this point, and may have even viewed this portion multiple times).

◦Below the line: Indicates that users didn't like this portion of the video as much as the rest of the video on average (i.e. they exited the video at this point).

•Call-to-Action (How many people are clicking on the call-to-action on your video):
◦Clicks

◦Impressions

◦Clickthrough rate (CTR)