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.
[youtube=http://www.youtube.com/watch?v=0eSYSa8mm10&feature=youtu.be]
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..
watch?v=5yVcJJdvt-o&feature=related
Have a good day!