The Traffic tab in your dashboard includes a table of your Top Videos for whatever time period you select at the top of the page. This table shows how many plays each video has and the percentage of readers who have clicked to watch that video (Play Rate). These statistics help you see what's working and where you might want to change the video’s placement on the page or add some text to encourage more people to click on the video.
Looking for your video earnings? Check out this article.