YouTube Video Trends Dashboard
It has some great features to help you identify rising “buzz” videos, and then breakdown that buzz to regional areas. You can also show the most shared or the most viewed videos (which is an interesting comparison in itself). Then just need to jump onto the Video Targeting Tool to make sure your advertisement takes advantage of these trends! It’s certainly a much cleaner interface than some of the more popular 3rd party sites that have filled this void over the years.
Give it a try and let me know what you think!