I thought this was really important information about gaining information about your customers through YouTube Analytics (now replacing YouTube Insights). The full article text is below, along with a link to the original article.
Located at youtube.com/analytics, Analytics gives registered YouTube users all the data from Insight in a simpler design, with several nifty new options.
Users familiar with Google Analytics will quickly realize why the name change: YouTube Analytics is visually very similar to that tool.
It offers a summary report for your content on YouTube, a data filter that allows you to filter reports by content, geography and date, and an interactive map that accompanies most reports, showing you the geographic distribution of the metric you’re interested in.
You can now also easily see which videos are driving the most views and subscriptions for you, as well as how long viewers watched your videos. Finally, you can now download the currently displayed report (rather than all data).
If you cannot access Analytics, don’t worry: Google says it will be rolling it out to “everyone on a modern browser over the course of the day.” A detailed FAQ covering all the features of Analytics is available here.