YouTube has added new statistics to YouTube Insights, the YouTube video analytics. I wrote about YouTube Insights when it first launched a year ago. Today, they added features to tell you how engaged your viewers are, i.e. do they like your videos?
YouTube added a new tab named "community" clicking on that tab brings up the "User Engagement" stats. It looks like this for my account:
You can also break the community stats down by "ratings":
Or by "comments":
Forum discussion at YouTube Help.