This is an older video but I have to say that when I was at the 2012 event it was incredible to be in a stadium with 9000 (mainly) men and women singing hymns to the glory of God. It was an amazingly powerful and emotional experience.
Bob Kauflin makes some interesting points about worship at the TGC events in the USA. Definitely worth clicking on! Listen out for the most bizrre squawk at 4:40..
Have a good day!