In the previous video learned the basics of using the event viewer. In this video we use that knowledge in a common scenario: investigating the performance of an ASP.NET server scenario. The video discusses the ASP.NET ETW events as well important fields like the 'ContextID' field that let you quickly home in on the processing that is related to a single event. This is VERY helpful in understanding performance regressions and sporatic peformance degrades.
It is best to watch the video using one of the high quality links on the right so the text is readable.
The next video is on showing you how to insert your own events int the ETW stream. You may also be interested in the whole PerfView Tutorial Series, as well as performance related material at Vance Morrison's Performance Blog.